chore: remove Python 3.9 from our build infrastructure

[rtyler]

Fixes #3886

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.17%. Comparing base (89a21c0) to head (59a4e04).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3937   +/-   ##
=======================================
  Coverage   74.17%   74.17%           
=======================================
  Files         152      152           
  Lines       39554    39554           
  Branches    39554    39554           
=======================================
  Hits        29338    29338           
  Misses       8887     8887           
  Partials     1329     1329           

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[ion-elgreco]

We can bump the min abi version as well in the pyo3 features