gha: Run tests with python 3.12

[postlund]

Relates to #2182

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8d883fb) 88.90% compared to head (97921f8) 88.75%.
Report is 1 commits behind head on master.

❗ Current head 97921f8 differs from pull request most recent head 90e7e28. Consider uploading reports for the commit 90e7e28 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2207      +/-   ##
==========================================
- Coverage   88.90%   88.75%   -0.16%     
==========================================
  Files         168      167       -1     
  Lines       11370    11225     -145     
==========================================
- Hits        10109     9963     -146     
- Misses       1261     1262       +1     

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