Bug: [CYPRESS] Fiuu Connector Configuration and Payment Processing Issues



The FIUU Connector is not functioning as expected.

### Expected Behavior:  
- The Fiuu Connector should be configurable without errors.  
- Test Cases should pass successfully through the Fiuu Payment Connector.  

### Actual Behavior:  
- Errors occur during the configuration process.  
- Test Cases do not go through as expected.  
## Type of Change

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

## Description
<!-- Describe your changes in detail -->
The FIUU Connector was not functioning as expected.

## Key Changes

- Added fiuu connector configs for `PaymentConfirmWithShippingCost`, `ZeroAuthMandate`, and `SaveCardConfirmAutoCaptureOffSessionWithoutBilling`.
- Added `billing.email` in some places in the configs where it was a required parameter.
- Mapped `error_message: "The currency not allow for the RecordType"` wherever necessary.
- Mandate Payments using PMID responds with the `connector_transaction_id: null` if the payment fails. So, changed the command accordingly.
- Fiuu does not support Connector Diagnostic, so updated the exclusion list to include Fiuu connector.


### Additional Changes

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


## Motivation and Context
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## How did you test it?
Initial Condition
<img width="710" alt="image" src="https://github.com/user-attachments/assets/976bb14e-c200-4d34-a61d-a8ab46115824" />

Current Condition
<img width="710" alt="image" src="https://github.com/user-attachments/assets/3f01b9c3-3de1-468a-b022-2733d1c03c0b" />



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

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