Remove all uses of Step.call #4950

Job	Run time
check / Load tox environments	5s
latest_crds_contexts / retrieve latest CRDS contexts	2s
webbpsf_data_cache / retrieve latest WebbPSF data cache key	3s
crds_context	1s
check / check-dependencies (ubuntu-latest)	57s
test / Load tox environments	6s
test / py310-oldestdeps-webbpsf-cov (ubuntu-latest)	28m 35s
test / py310-webbpsf-nolegacypath (ubuntu-latest)	23m 12s
test / py311-ddtrace-webbpsf (ubuntu-latest)	24m 30s
test / py311-ddtrace-webbpsf (macos-latest)	17m 39s
test / py311-webbpsf-cov (ubuntu-latest)	25m 14s
test / py312-webbpsf (ubuntu-latest)	24m 16s
	2h 24m 40s

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