Add romanisim to downstream #18

Job	Run time
environment	1s
crds_contexts / retrieve latest CRDS contexts	5s
astropy / Load tox environments	5s
third-party / Load tox environments	4s
get_romanism_data / download_webbpsf_data / download and cache WebbPSF data	6s
third-party / ndcube (ubuntu-latest)	1m 1s
third-party / dkist (ubuntu-latest)	1m 54s
astropy / specutils (ubuntu-latest)	1m 40s
jwst / Load tox environments	7s
romancal / Load tox environments	8s
get_romanism_data / combine_data_cache	5s
romanisim_data_cache / retrieve latest data cache key	3s
jwst / py311-test-jwst-cov-xdist (ubuntu-latest)	1m 38s
romancal / py311-test-romancal-cov-xdist (ubuntu-latest)	1m 37s
romanisim / Load tox environments	6s
romanisim / py311-test-romanisim-cov-xdist (ubuntu-latest)	1m 16s
	9m 56s

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