Remove the FPS/TVAC schemas from latest

[WilliamJamieson]

Closes #616

This PR removes the FPS and TVAC schemas from the latest schemas. In addition to this it adds them to a "new" manifest static (name can be changed), which denotes that the schemas tagged in it are no-longer going to be updated and will remain as they are. While not strictly necessary (everything will still function), this should become useful if we want to make changes to RDM which partially break handling of the associated static files, in that case we can build a distinct RDM extension which only handles those schemas where we can maintain a minimal functionality for file reads in RDM.

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

❌ Patch coverage is 97.56098% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 96.77%. Comparing base (c57e0ca) to head (3c1c757).
⚠️ Report is 115 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/test_schemas.py	66.66%	2 Missing ⚠️
tests/conftest.py	98.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #617      +/-   ##
==========================================
- Coverage   97.46%   96.77%   -0.69%     
==========================================
  Files           8        8              
  Lines         592      621      +29     
==========================================
+ Hits          577      601      +24     
- Misses         15       20       +5     

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[WilliamJamieson]

Maybe instead of static we should use some other term such as:

• stale
• fixed
• constant
• invariant

other suggestions are welcome.

In any case, I'm happy to make adjustments if we decide on a better term.

[WilliamJamieson]

Here I made the schema_uri test cases only visit the uris in latest. This way we don't pick up failures in test_schemas which arise from issues in published schemas.

[schlafly]

We chatted about this on Thursday. I think we thought this was good to go. I'm happy to sign off; anyone else want to weigh in beforehand?

[PaulHuwe]

I am confused - I thought that RTB said they did not want the schemas moved out of latest in the Thursday meeting. I am fine with doing so and the test changes, but I want to keep things in line with their wishes. @tddesjardins @rcosenti-stsci Could one of you clarify?

[schlafly]

My memory of the Thursday discussion---RTB confirmed that they didn't want TVAC / FPS to ever change. They didn't care very much about how we achieved that. I think it's fine to move them out of latest to static.

[PaulHuwe]

LGTM