[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/calcos/settings/publishing/?provider=github&owner=spacetelescope&repository=calcos&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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #255   +/-   ##
=======================================
  Coverage        ?   79.09%           
=======================================
  Files           ?       34           
  Lines           ?     1612           
  Branches        ?        0           
=======================================
  Hits            ?     1275           
  Misses          ?      337           
  Partials        ?        0           

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