Drop python 3.10 support

[braingram]

Now that jwst has dropped 3.10 this package can drop 3.10 (per SPEC 0).

This PR:

• drops python 3.10 support
• increases the numpy and astropy minimum versions (by SPEC 0)
• updates the CI and docs removing 3.10 usage

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 jwst regression tests with this branch installed ("git+https://github.com/<fork>/stdatamodels@<branch>")

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 78.17%. Comparing base (788f7bd) to head (18d18bd).
Report is 13 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #392       +/-   ##
===========================================
+ Coverage   67.59%   78.17%   +10.57%     
===========================================
  Files         115      115               
  Lines        5932     5145      -787     
===========================================
+ Hits         4010     4022       +12     
+ Misses       1922     1123      -799     

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[emolter]

The tomli additional dependency here can also be removed: see https://github.com/codespell-project/codespell?tab=readme-ov-file#using-a-config-file

[emolter]

Sorry I should have looked more closely, there are other instances that are removable as well:
https://github.com/search?q=repo%3Aspacetelescope%2Fstdatamodels%20tomli&type=code

Noticed this because we also didn't remove them yet for jwst - I submitted a follow-up PR to do so.