Drop support for python 3.10

[WilliamJamieson]

Per spec 0 we should be dropping python 3.10 support. This PR drops 3.10 support and then bumps all the testing envs by one python version. It is based off of #300 so that python 3.13 can be used in the tests.

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>/stcal@<branch>")
    • jwst regression test
    • romancal regression test

news fragment change types...

• changes/<PR#>.apichange.rst: change to public API
• changes/<PR#>.bugfix.rst: fixes an issue
• changes/<PR#>.general.rst: infrastructure or miscellaneous change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.55%. Comparing base (728b877) to head (09fedbf).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #327      +/-   ##
==========================================
- Coverage   29.56%   29.55%   -0.01%     
==========================================
  Files          37       36       -1     
  Lines        8332     7949     -383     
==========================================
- Hits         2463     2349     -114     
+ Misses       5869     5600     -269     

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