Update auth manager interface to extend fast APIs

[vincbeck]

Description

Today, it is possible to extend the Flask Rest API using get_api_endpoints in the auth manager interface. In Airflow 3, we will no longer use Flask and use Fast API instead. The auth manager interface needs to be updated to add an option so that the auth manager can extend the Fast API defined in Airflow.

Use case/motivation

Example of usage: the FAB auth manager needs to extend the Airflow API to add user and roles related API.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[vincbeck]

@pierrejeambrun

[pierrejeambrun]

Thanks