TVAC and FPS in RCAL Code

[PaulHuwe]

RAD datamodels have strayed far enough from FPS & TVAC models that RomanCAL can no longer process them. Methods need to be added to translate FPS & TVAC into RCAL readable datamodels. The following test can be used for such methods:

https://github.com/spacetelescope/roman_datamodels/blob/main/tests/test_models.py#L1037