Convert remaining graphics tests to PyTest

[trexfeathers]

ruff check --select=PT compliant

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.68%. Comparing base (2e18ae8) to head (76482c5).
Report is 15 commits behind head on FEATURE_pytest_conversion.

Additional details and impacted files

@@                      Coverage Diff                      @@
##           FEATURE_pytest_conversion    #5867      +/-   ##
=============================================================
- Coverage                      89.74%   89.68%   -0.07%     
=============================================================
  Files                             92       92              
  Lines                          22940    22940              
  Branches                        5462     5462              
=============================================================
- Hits                           20588    20573      -15     
- Misses                          1620     1639      +19     
+ Partials                         732      728       -4     

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[ESadek-MO]

Only comment is personal preference, otherwise happy with all the changes!