Bug: chore: address Rust 1.88.0 clippy lints



Address the clippy lints occurring due to new rust version 1.88.0

See https://github.com/juspay/hyperswitch/issues/3391 for more information.
diff --git a/crates/router/src/core/payment_methods/vault.rs b/crates/router/src/core/payment_methods/vault.rs
index c59a2f84c35..d5848c7f418 100644
--- a/crates/router/src/core/payment_methods/vault.rs
+++ b/crates/router/src/core/payment_methods/vault.rs
@@ -1555,10 +1555,7 @@ pub async fn insert_cvc_using_payment_token(
             .change_context(errors::ApiErrorResponse::InternalServerError)
             .attach_printable("Failed to get redis connection")?;
 
-        let key = format!(
-            "pm_token_{}_{}_hyperswitch_cvc",
-            payment_token, payment_method
-        );
+        let key = format!("pm_token_{payment_token}_{payment_method}_hyperswitch_cvc");
 
         let payload_to_be_encrypted = TemporaryVaultCvc { card_cvc };
 
@@ -1601,10 +1598,7 @@ pub async fn retrieve_and_delete_cvc_from_payment_token(
         .change_context(errors::ApiErrorResponse::InternalServerError)
         .attach_printable("Failed to get redis connection")?;
 
-    let key = format!(
-        "pm_token_{}_{}_hyperswitch_cvc",
-        payment_token, payment_method
-    );
+    let key = format!("pm_token_{payment_token}_{payment_method}_hyperswitch_cvc");
 
     let data = redis_conn
         .get_key::<bytes::Bytes>(&key.clone().into())
diff --git a/crates/router/src/core/unified_connector_service.rs b/crates/router/src/core/unified_connector_service.rs
index d9c00fbadba..3cdcb28d4d8 100644
--- a/crates/router/src/core/unified_connector_service.rs
+++ b/crates/router/src/core/unified_connector_service.rs
@@ -101,8 +101,7 @@ pub fn build_unified_connector_service_payment_method(
                 }
                 _ => {
                     return Err(UnifiedConnectorServiceError::NotImplemented(format!(
-                        "Unimplemented card payment method type: {:?}",
-                        payment_method_type
+                        "Unimplemented card payment method type: {payment_method_type:?}"
                     ))
                     .into());
                 }

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

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

## Description
<!-- Describe your changes in detail -->
This pull request includes a minor improvement to error message formatting in the `build_unified_connector_service_payment_method` function.

* [`crates/router/src/core/unified_connector_service.rs`](diffhunk://#diff-b8e808846f58e455687a9e192c1c8d192598081aac942628640c42c1d397dfaeL104-R104): Updated the error message to use inline formatting for `payment_method_type`, improving readability and consistency.

### 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`
-->


## 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)?
-->


## Checklist
<!-- Put an `x` in the boxes that apply -->

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