Bug: [FIX] Re-revert changes done in `pr#7866` by `pr#7882`



### Context 
[PR#7882](https://github.com/juspay/hyperswitch/pull/7882) accidentally reverted changes made in [PR#7882](https://github.com/juspay/hyperswitch/pull/7866), which was a merchant critical PR.

### Proposed Fix
Re revert the changes.
diff --git a/crates/router/src/core/payment_methods/cards.rs b/crates/router/src/core/payment_methods/cards.rs
index 5749715e51b..c228975faac 100644
--- a/crates/router/src/core/payment_methods/cards.rs
+++ b/crates/router/src/core/payment_methods/cards.rs
@@ -3485,61 +3485,6 @@ pub async fn list_payment_methods(
         response
     );
 
-    // Filter out wallet payment method from mca if customer has already saved it
-    customer
-        .as_ref()
-        .async_map(|customer| async {
-            let wallet_pm_exists = response
-                .iter()
-                .any(|mca| mca.payment_method == enums::PaymentMethod::Wallet);
-            if wallet_pm_exists {
-                match db
-                    .find_payment_method_by_customer_id_merchant_id_status(
-                        &((&state).into()),
-                        merchant_context.get_merchant_key_store(),
-                        &customer.customer_id,
-                        merchant_context.get_merchant_account().get_id(),
-                        common_enums::PaymentMethodStatus::Active,
-                        None,
-                        merchant_context.get_merchant_account().storage_scheme,
-                    )
-                    .await
-                {
-                    Ok(customer_payment_methods) => {
-                        let customer_wallet_pm = customer_payment_methods
-                            .iter()
-                            .filter(|cust_pm| {
-                                cust_pm.get_payment_method_type() == Some(enums::PaymentMethod::Wallet)
-                            })
-                            .collect::<Vec<_>>();
-
-                        response.retain(|mca| {
-                            !(mca.payment_method == enums::PaymentMethod::Wallet
-                                && customer_wallet_pm.iter().any(|cust_pm| {
-                                    cust_pm.get_payment_method_subtype() == Some(mca.payment_method_type)
-                                }))
-                        });
-
-                        logger::debug!("Filtered out wallet payment method from mca since customer has already saved it");
-                        Ok(())
-                    }
-                    Err(error) => {
-                        if error.current_context().is_db_not_found() {
-                            Ok(())
-                        } else {
-                            Err(error)
-                                .change_context(errors::ApiErrorResponse::InternalServerError)
-                                .attach_printable("failed to find payment methods for a customer")
-                        }
-                    }
-                }
-            } else {
-                Ok(())
-            }
-        })
-        .await
-        .transpose()?;
-
     let mut pmt_to_auth_connector: HashMap<
         enums::PaymentMethod,
         HashMap<enums::PaymentMethodType, String>,

## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->
Context
https://github.com/juspay/hyperswitch/pull/7882 accidentally reverted changes made in https://github.com/juspay/hyperswitch/pull/7866, which was a merchant critical PR.

Reason:
- This might have occured due to incorrect resolution of merge conflicts in [this PR](https://github.com/juspay/hyperswitch/pull/7882)
### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->

### Fixes #7952 
## Motivation and Context
<!--
Why is this change required? What problem does it solve?
If it fixes an open issue, please link to the issue here.

If you don't have an issue, we'd recommend starting with one first so the PR
can focus on the implementation (unless it is an obvious bug or documentation fix
that will have little conversation).
-->


## How did you test it?
<!--
Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
-->
- Create MA and an MCA with wallets
- Create a payment and  Save one wallet (eg: Paypal)
- Create a new payment intent
- List the Merchant PML again, Paypal would still be there
##### cURL
```bash
curl --location 'http://localhost:8080/account/payment_methods?client_secret={{client_secret}}' \
--header 'Accept: application/json' \
--header 'api-key: {{publishable_key}}'
```
##### Response

```json
{
    "redirect_url": null,
    "currency": "USD",
    "payment_methods": [
        {
            "payment_method": "wallet",
            "payment_method_types": [
                {
                    "payment_method_type": "paypal",
                    "payment_experience": [
                        {
                            "payment_experience_type": "invoke_sdk_client",
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "payment_experience_type": "redirect_to_url",
                            "eligible_connectors": [
                                "paypal"
                            ]
                        }
                    ],
                    "card_networks": null,
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": {
                        "shipping.address.city": {
                            "required_field": "shipping.address.city",
                            "display_name": "city",
                            "field_type": "user_shipping_address_city",
                            "value": "San Fransico"
                        },
                        "shipping.address.first_name": {
                            "required_field": "shipping.address.first_name",
                            "display_name": "shipping_first_name",
                            "field_type": "user_shipping_name",
                            "value": "joseph"
                        },
                        "shipping.address.state": {
                            "required_field": "shipping.address.state",
                            "display_name": "state",
                            "field_type": "user_shipping_address_state",
                            "value": "California"
                        },
                        "shipping.address.country": {
                            "required_field": "shipping.address.country",
                            "display_name": "country",
                            "field_type": {
                                "user_shipping_address_country": {
                                    "options": [
                                        "ALL"
                                    ]
                                }
                            },
                            "value": "US"
                        },
                        "shipping.address.line1": {
                            "required_field": "shipping.address.line1",
                            "display_name": "line1",
                            "field_type": "user_shipping_address_line1",
                            "value": "1467"
                        },
                        "shipping.address.zip": {
                            "required_field": "shipping.address.zip",
                            "display_name": "zip",
                            "field_type": "user_shipping_address_pincode",
                            "value": "94122"
                        },
                        "shipping.address.last_name": {
                            "required_field": "shipping.address.last_name",
                            "display_name": "shipping_last_name",
                            "field_type": "user_shipping_name",
                            "value": "Doe"
                        }
                    },
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        },
        {
            "payment_method": "card",
            "payment_method_types": [
                {
                    "payment_method_type": "credit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "CartesBancaires",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": {
                        "payment_method_data.card.card_exp_year": {
                            "required_field": "payment_method_data.card.card_exp_year",
                            "display_name": "card_exp_year",
                            "field_type": "user_card_expiry_year",
                            "value": null
                        },
                        "payment_method_data.card.card_exp_month": {
                            "required_field": "payment_method_data.card.card_exp_month",
                            "display_name": "card_exp_month",
                            "field_type": "user_card_expiry_month",
                            "value": null
                        },
                        "payment_method_data.card.card_number": {
                            "required_field": "payment_method_data.card.card_number",
                            "display_name": "card_number",
                            "field_type": "user_card_number",
                            "value": null
                        },
                        "payment_method_data.card.card_cvc": {
                            "required_field": "payment_method_data.card.card_cvc",
                            "display_name": "card_cvc",
                            "field_type": "user_card_cvc",
                            "value": null
                        }
                    },
                    "surcharge_details": null,
                    "pm_auth_connector": null
                },
                {
                    "payment_method_type": "debit",
                    "payment_experience": null,
                    "card_networks": [
                        {
                            "card_network": "JCB",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Mastercard",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "UnionPay",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Discover",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "CartesBancaires",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "DinersClub",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Visa",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "Interac",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        },
                        {
                            "card_network": "AmericanExpress",
                            "surcharge_details": null,
                            "eligible_connectors": [
                                "paypal"
                            ]
                        }
                    ],
                    "bank_names": null,
                    "bank_debits": null,
                    "bank_transfers": null,
                    "required_fields": {
                        "payment_method_data.card.card_exp_year": {
                            "required_field": "payment_method_data.card.card_exp_year",
                            "display_name": "card_exp_year",
                            "field_type": "user_card_expiry_year",
                            "value": null
                        },
                        "payment_method_data.card.card_exp_month": {
                            "required_field": "payment_method_data.card.card_exp_month",
                            "display_name": "card_exp_month",
                            "field_type": "user_card_expiry_month",
                            "value": null
                        },
                        "payment_method_data.card.card_number": {
                            "required_field": "payment_method_data.card.card_number",
                            "display_name": "card_number",
                            "field_type": "user_card_number",
                            "value": null
                        },
                        "payment_method_data.card.card_cvc": {
                            "required_field": "payment_method_data.card.card_cvc",
                            "display_name": "card_cvc",
                            "field_type": "user_card_cvc",
                            "value": null
                        }
                    },
                    "surcharge_details": null,
                    "pm_auth_connector": null
                }
            ]
        }
    ],
    "mandate_payment": null,
    "merchant_name": "standard",
    "show_surcharge_breakup_screen": false,
    "payment_type": "normal",
    "request_external_three_ds_authentication": false,
    "collect_shipping_details_from_wallets": false,
    "collect_billing_details_from_wallets": false,
    "is_tax_calculation_enabled": false
}
```
## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [ ] I addressed lints thrown by `cargo clippy`
- [x] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible
