Update python and RPM packaging

[rosswhitfield]

• This adds a pyproject.toml to replace all the previous python configuration.
• The spec file was updated to make use of the python packaging.
• I removed the Makefile for a a simpler rpmbuild.sh.
• The Dockerfile used to build the RPM was updated to be based of RHEL9 and I have the CI now running a few of the integration tests on the installed RPM for some basic verification the the RPM is correct.

Ref 2821

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (159fe71) 63.39% compared to head (ca9c375) 63.39%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #34   +/-   ##
=======================================
  Coverage   63.39%   63.39%           
=======================================
  Files          16       16           
  Lines        1183     1183           
=======================================
  Hits          750      750           
  Misses        433      433           

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