load test matrix from json file

[pdabelf5]

Proposed changes

Refactor test setup matrix

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (be56efb) 52.09% compared to head (0eca4ed) 52.08%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4795      +/-   ##
==========================================
- Coverage   52.09%   52.08%   -0.02%     
==========================================
  Files          60       60              
  Lines       17376    17376              
==========================================
- Hits         9052     9050       -2     
- Misses       8008     8010       +2     
  Partials      316      316              

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