TEST: Use `ModelContainer.get_crds_parameters` #730

Job	Run time
test / Load tox environments	9s
test_downstream / Load tox environments	4s
test_downstream / py311-jwst-xdist (ubuntu-latest)	23m 38s
test_downstream / py311-romancal-xdist (ubuntu-latest)	4m 2s
test / py39-oldestdeps-cov-xdist (ubuntu-latest)	48s
test / py310-xdist (ubuntu-latest)	32s
test / py311-xdist (macos-latest)	37s
test / py311-cov-xdist (ubuntu-latest)	37s
test / py312-xdist (ubuntu-latest)	33s
	31m 0s

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