3.12.4 updates

[apetenchea]

This PR prepares a next release and adds the following:

• Support for usePlanCache option (since 3.12.4)
• There was also a bug in the way we used to handle the cache parameter. It is part of the options sub-object.
• Removing support for Python 3.8
• Support for auto-generation of errno.py.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 71.11111% with 13 lines in your changes missing coverage. Please review.

Project coverage is 94.74%. Comparing base (8e6aaca) to head (f034931).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
arango/aql.py	27.77%	13 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #361      +/-   ##
==========================================
- Coverage   95.94%   94.74%   -1.21%     
==========================================
  Files          26       26              
  Lines        4296     4298       +2     
==========================================
- Hits         4122     4072      -50     
- Misses        174      226      +52     

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[aMahanna]

LGTM, just need to remove errors.py