feat: support recurring payment for bank redirect stripe

[hrithikesh026]

Type of Change

• New feature

Description

• Added support for recurring payments through bank redirect in stripe.
• Stripe internally converts some bank redirect method data to sepa direct debit data and attaches the generated sepa direct debit to the customer for future usage.
• Stripe converts Bancontact, Sofort and Ideal bank redirects to sepa direct debit to attach to the customer. Other bank redirect types are not supported for recurring payments.
• The payment_method_id of generated sepa direct debit is not return in payment response of stripe. The payment_method_id returned in payment response belongs to bank redirect method used to create the initial payment. This cannot be used to make recurring payments.
• We must use the generated sepa direct debit method_id to make recurring payments. To get this, we need to do a PSync call in payment redirect flow after the user completes required actions in stripe's window.
• generated sepa direct debit method_id is present inside latest_charge field of stripes Payment get response. Thats why we need to expand latest_charge
• After this we update the mandate table with the new valid payment_method_id in connector_mandate_ids column. (existing implementation)

Additional Changes

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

Motivation and Context

This PR would allow creating and making recurring payments using bank redirect payment method(Sofort, Ideal and Bancontact) through stripe.

The changes in this PR are continuation of #1119

How did you test it?

Manual.
Setup Mandate

Make recurring mandate payment using generated mandate_id

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