feat(connector): [Adyen] Implement Open Banking Uk in Bank Redirects

[Sakilmostak]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

    "payment_method": "bank_redirect",
    "payment_method_data": {
        "bank_redirect": {
            "open_banking_uk": {
                "issuer": "open_bank_success",
                "country": "GB"
            }
        }
    }

Motivation and Context

How did you test it?

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable