TEST: Remove uses of fitsrec

[braingram]

This is a test PR.

There are many uses in jwst that will prevent this including:

• case insensitive column access
• usage of table.field('column_name') (instead of `table['column_name'])
• 'TUNIT' carry-over
• 'string' columns are returned as strings via fitsrec by turn into bytes when converted to a recarray. This is further complicated by the schema listing a string type for columns that fitsrec returns as unicode (even through these are reported as strings).
• when a non-existent 'field/column' is accessed FITS_rec raises a KeyError whereas a numpy record array raises a ValueError

This PR is work towards finding and removing those limitations to hopefully get to a point where any FITS_rec opened from a file can immediately be converted to a record array to work around all the insidious bugs caused by FITS_rec.

Resolves JP-nnnn Resolves RCAL-nnnn

Closes #

This PR addresses ...

Checklist

• [ ] added entry in CHANGES.rst (either in Bug Fixes or Changes to API)
• [ ] updated relevant tests
• [ ] updated relevant documentation
• [ ] updated relevant milestone(s)
• [ ] added relevant label(s)

[codecov[bot]]

Codecov Report

Patch coverage is 100.00% of modified lines.

Files Changed	Coverage
src/stdatamodels/jwst/datamodels/util.py	ø
src/stdatamodels/dynamicdq.py	100.00%
src/stdatamodels/fits_support.py	100.00%
src/stdatamodels/model_base.py	100.00%
src/stdatamodels/properties.py	100.00%
src/stdatamodels/util.py	100.00%

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