Fix issue when file is deleted in archive script

[WilliamJamieson]

In PR #789 a latest file AND its symlink were removed, which exposed a bug in the archive comparison script. This is an oversight as for the SOC schemas never result in a file missing form the src/rad/resources directory as we are versioning those schemas. However, the SSC schemas are not versioned so when a file/symlink was removed from src/rad/resources ASDF fails to fully resolve the old state of RAD.

This PR fixes this by also targeting the changes to src/rad/resources.

Tasks

• Update or add relevant rad tests.
• Update relevant docstrings and / or docs/ page.
• Does this PR change any schema files?
  • Schema changes were discussed at RAD Review Board meeting.
• 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).
  • Start a romancal regression test (https://github.com/spacetelescope/RegressionTests/actions/workflows/romancal.yml) with this branch installed ("git+https://github.com/<fork>/rad@<branch>").
  • Update relevant roman_datamodels utilities and tests.

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 86.34%. Comparing base (6ab0be9) to head (5c6dfc0).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #793      +/-   ##
==========================================
+ Coverage   85.87%   86.34%   +0.46%     
==========================================
  Files          14       15       +1     
  Lines        1069     1135      +66     
==========================================
+ Hits          918      980      +62     
- Misses        151      155       +4     

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[PaulHuwe]

LGTM