FEAT: New filter_table_to_models function in filter_parameterization

This is a follow-up of https://github.com/spacetelescope/synphot_refactor/pull/257#discussion_r880749484 from @eteq 

*Maybe it also makes sense to add a convenience function `filter_table_to_models` function that takes a table and returns a dictionary of models for all of the table rows?*