refactor(connector): [Paypal] Change error message from NotSupported to NotImplemented

[parisosuch-dev]

Type of Change

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

Description

Refactored NotSupported Error calls to NotImplemented in the Paypal transformer.

Additional Changes

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

Changes are here: crates/router/src/connector/paypal/transformer.rs

Motivation and Context

These changes fix the open issue #2858.

How did you test it?

Make any payment for Paypal connector for any PM which is not implemented, and see for the error message - it should be payment method not implemented

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

[parisosuch-dev]

@swangi-kumari are you able to review my PR. I resolved the conflict.

[parisosuch-dev]

@swangi-kumari this PR should be ready to go

[parisosuch-dev]

@prasunna09 possibly review so I can close this out?

[VedantKhairnar]

Hey @parisosuch-dev,
Thanks for the PR and apologies for the delay. We would be happy to review it and get the PR merged.

[parisosuch-dev]

Hey @parisosuch-dev, Thanks for the PR and apologies for the delay. We would be happy to review it and get the PR merged.

Sounds good -- I reopened the PR.

[swangi-kumari]

Hey @parisosuch-dev ,
Please resolve the conflicts from your branch.

[VedantKhairnar]

Hey @parisosuch-dev ,
Let us know if you are facing any issues and need assistance in the merge conflicts. Happy to help : )