[FEATURE REQ] Support Password - Less connection for Azure PostgreSQL flexible server in Spring

Context

azure-identity-providers-jdbc-postgresql and spring-cloud-azure-starter-jdbc-postgresql can work with single postgresql server, we should make sure they can work with flexible postgresql server too.

1. Manual test to make sure they can work
2. Create a IT to make sure they can work in pipeline.
3. Test multiple flexible versions.

• azure-identity-providers-jdbc-postgresql will be been rename to azure-identity-extensions in GA #32282.

Goal

Make sure our released postgresql plugin libraries also support AAD authentication with different postgresql flexible server versions.

Tasks/Plan

• We want to use an integration test to verify that our spring-cloud-azure-starter-jdbc-postgresql can work. Considering testing all PSQL server versions would require lots of efforts, we will only test one PSQL version.
  • If it’s possible we may try to run IT with a random postgresql server, if not easy, we will pin the server version number.
• We will try to test PSQL flexible server, but if it’s not available yet, we will test with single server.

[fangjian0423]

This configuration parameter also not work:

todo=> SET aad_validate_oids_in_tenant = off;
ERROR:  unrecognized configuration parameter "aad_validate_oids_in_tenant"

[backwind1233]

This doc:Migrate an application to use passwordless connections with Azure Database for PostgreSQL can’t work with postgresql flexible server while creating role.