[Backport release-1.8] [ci/python] Use Python 3.11 for single version CI runs

[github-actions]

Backport b0d5fb4 from #2255

[codecov]

Codecov Report

Merging #2267 (5f30d1a) into release-1.8 (e43935b) will decrease coverage by 11.69%.
Report is 3 commits behind head on release-1.8.
The diff coverage is n/a.

❗ Current head 5f30d1a differs from pull request most recent head a49b5b3. Consider uploading reports for the commit a49b5b3 to get more accurate results

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.8    #2267       +/-   ##
================================================
- Coverage        90.18%   78.50%   -11.69%     
================================================
  Files               34      137      +103     
  Lines             3809    10684     +6875     
  Branches             0      215      +215     
================================================
+ Hits              3435     8387     +4952     
- Misses             374     2198     +1824     
- Partials             0       99       +99     

Flag	Coverage Δ
libtiledbsoma	67.44% <0.00%> (?)
python	90.18% <0.00%> (ø)
r	74.69% <0.00%> (?)

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Components	Coverage Δ
python_api	90.18% <0.00%> (ø)
libtiledbsoma	48.85% <0.00%> (∅)