JP-3988: Enhance the table reports for STFITSDiff

[penaguerrero]

Resolves JP-3988

This PR addresses enhancing the reports for table differences and enables providing strings and integers to the list of HDUs to ignore. The name of this option is ignore_hdus and it lives in the fitsdiff_default_kwargs dictionary set up in the specific test(s).

Tasks

• If you have a specific reviewer in mind, tag them.
• add a build milestone, i.e. Build 12.0 (use the latest build if not sure)
• Does this PR change user-facing code / API? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see changelog readme for instructions)
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

[codecov]

Codecov Report

❌ Patch coverage is 3.10559% with 156 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.27%. Comparing base (a1cbc2c) to head (4ecbbf2).
⚠️ Report is 694 commits behind head on main.

Files with missing lines	Patch %	Lines
jwst/regtest/st_fitsdiff.py	1.55%	127 Missing ⚠️
jwst/scripts/stfitsdiff.py	9.37%	29 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9413      +/-   ##
==========================================
+ Coverage   76.58%   77.27%   +0.68%     
==========================================
  Files         364      362       -2     
  Lines       36595    36279     -316     
==========================================
+ Hits        28028    28035       +7     
+ Misses       8567     8244     -323     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[melanieclarke]

I love the new reports!

There are a couple little weird things to track down in the new table reports and HDU ignoring - I'll keep working with you offline on those.

In the meantime, a couple other small suggestions below, and also:
I can't add a comment in the right place, but for some data I get an annoying RuntimeWarning ("invalid value encountered in subtract") in the diff_total calculation in 982. Can you please filter it out?

[melanieclarke]

All my comments are addressed and local tests look good. No need for regtests, since this code is as-yet unused.