test hooks without requiring jwst

[braingram]

The current test_hooks file is skipped if jwst is not installed:

stpipe/tests/test_hooks.py

Line 3 in 0c3d37e

pytest.importorskip("jwst")

This PR removes the importorskip and tests the hooks without requiring jwst is installed.

As this is a tests only change no regression tests were run and no changelog was added.

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

Attention: Patch coverage is 87.75510% with 6 lines in your changes missing coverage. Please review.

Project coverage is 94.62%. Comparing base (c55d0d2) to head (1e50496).
Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/test_hooks.py	86.66%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #199       +/-   ##
===========================================
+ Coverage   75.26%   94.62%   +19.35%     
===========================================
  Files          34       37        +3     
  Lines        2689     3126      +437     
===========================================
+ Hits         2024     2958      +934     
+ Misses        665      168      -497     

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