fix downstream ci

[braingram]

See spacetelescope/stcal#297
These are the same changes adapted to this package.

Currently downstream testing of jwst and romancal end up using the pyproject.toml in this repository for determining pytest configuration.
This ends up with pytest using options in these downstream tests that differ from the options used by the downstream packages in their tests (when run in their own CI). This in turn results in lots of false failures in our downstream testing.

This PR changes how the jwst and romancal downstream tests to use the pytest options defined in the respective repositories.

Tasks

• update or add relevant tests
• update relevant docstrings and / or docs/ page
• Does this PR change any API used downstream? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see below for change types)
  • run regression tests with this branch installed ("git+https://github.com/<fork>/stpipe@<branch>")
    • jwst regression test
    • romancal regression test

news fragment change types...

• changes/<PR#>.feature.rst: new feature
• changes/<PR#>.bugfix.rst: fixes an issue
• changes/<PR#>.doc.rst: documentation change
• changes/<PR#>.removal.rst: deprecation or removal of public API
• changes/<PR#>.misc.rst: infrastructure or miscellaneous change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.66%. Comparing base (5efae61) to head (3a03c8c).
Report is 6 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #191       +/-   ##
===========================================
+ Coverage   73.29%   94.66%   +21.36%     
===========================================
  Files          25       37       +12     
  Lines        1917     3109     +1192     
===========================================
+ Hits         1405     2943     +1538     
+ Misses        512      166      -346     

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[emolter]

I'm not confident enough in my understanding to approve this or find problems, but thanks for requesting my review anyway, it's fun to learn how to write CI workflows.

[braingram]

I'm not confident enough in my understanding to approve this or find problems, but thanks for requesting my review anyway, it's fun to learn how to write CI workflows.

Thanks! I was hoping your approval would be enough to get this in but it doesn't look like you're an "approved approver".