PostgreSQL tests for Entra Id connections

[PhilBastian]

Describe the suggested improvement

Is your improvement related to a problem? Please describe.

In order to verify that Entra Id connections are working correctly with the connection factory, it is desirable to have automated tests that utilise an Entra identity. In order to do this, we will need to have a PostgreSQL flexible server created by the CI test runner in addition to, or instead of, the current container based test setup.

Describe the suggested solution

Ideally encapsulated the Postgres setup into a setup action repository similar to the other ones we have already created

Describe alternatives you've considered

Additional Context

No response