MINIFICPP-1961 Python scripting compatibility with multiple python minor versions

[martinzink]

The bulk of this python rewrite was done by @dam4rus. I've took over because he got other responsibilities that made it unfeasable to finish the PR.

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This change replaces the previous Python extension implementation (based on PyBind11) with a pure Python C API implementation (with the limited stable API) https://docs.python.org/3/c-api/stable.html

I've included a new ci workflow that uses the centos tar.gz and verifies this new extension works on a large variety of platforms with large variety of python versions, but I don't think we want to run these on every commit. (Maybe on every release?)

I've also separated the current scripting extensions into lua/python extensions so it will be possible to build them together, and still use them without needing the other one's dependencies.

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[martinzink]

I've ran the new python compatibility tests on my fork.
https://github.com/martinzink/nifi-minifi-cpp/actions/runs/4114945925
After we merge this PR, we should be able to run this from github's UI

[martinzink]

I've followed @szaszm advice and readded ExecuteScript in a3b6e6b, so this PR doesn't break compatibility with older configs, and follows NiFi's way of doing ExecuteScript more closely.
A ScriptExecutor is loaded through ClassLoader, this means to use ExecuteScript you will need the script-extension aswell as the python-script-extension/lua-script-extension to use python/lua scripting.

This of course intruduces a bit of additional complexity (and maybe restrictions) vs the separate ExecuteLuaScript/ExecutePythonScript approach. Let me know what you think.

[martinzink]

I've also reran the compatibility tests after these changes.

[fgerlits]

I haven't got to the end of this, but only minor quibbles so far.