[build] remove maintainer password from PyPI publish workflow in lieu of trusted publisher attestation

[zacharyburnett]

Resolves SCSB-199

• add a Trusted Publisher configuration to the PyPI project by visiting https://pypi.org/manage/project/stcal/settings/publishing/?provider=github&owner=spacetelescope&repository=stcal&workflow_filename=build.yml
• remove pypi_token (STScI PyPI maintainer password) from build workflow
• wait for issue with reusable workflows to be resolved in pypa/warehouse

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 85.96%. Comparing base (e601527) to head (dcb1aed).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #353      +/-   ##
==========================================
- Coverage   86.00%   85.96%   -0.04%     
==========================================
  Files          61       61              
  Lines       10340    10333       -7     
==========================================
- Hits         8893     8883      -10     
- Misses       1447     1450       +3     

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