feat(pm_auth): Support different pm types in PM auth

[Sarthak1799]

Type of Change

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

Description

Support for SEPA and BACS in direct debit PM auth.
Earlier we only supported ACH based response from pm auth connector in PM auth, now have added support for BACS and SEPA based responses as well.

Additional Changes

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

Motivation and Context

How did you test it?

Have tested locally by hardcoding response from connector. This cannot be tested as it is in sandbox because Plaid always sends a basic ACH based response in sandbox which won't trigger the response structure for BACS and SEPA (the implementation of this PR).
A simple sanity testing however can be done for the feature, refer to this for testing instructions - #3047

Checklist

• 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
• I added a CHANGELOG entry if applicable