Python 3.9 unit testing

[awais786]

Right now its only running tests against python 3.9.
Running tests againsts gh hosted runners. Unit tests has failures.

  def clear_registered_transformers_cache():
        """
        Test helper to clear out any cached values of registered transformers.
        """
>       TransformerRegistry.get_write_version_hash.cache.clear()  # lint-amnesty, pylint: disable=no-member
E       AttributeError: 'functools.partial' object has no attribute 'cache'

Python 3.9 = #34196
python 3.10 = #34201
python 3.11 = #34202

[feanil]

Closing now that we hav tests passing on 3.11: #34374