test

Add common resample code to stcal. #2128

Job	Run time
check / Load tox environments	3s
test / Load tox environments	4s
test_downstream / Load tox environments	10s
check / check-style (ubuntu-latest)	45s
check / check-types (ubuntu-latest)	1m 35s
check / check-build (ubuntu-latest)	59s
test / py310-oldestdeps-cov-xdist (ubuntu-latest)	2m 11s
test / py310-xdist (ubuntu-latest)	2m 40s
test / py311-xdist (ubuntu-latest)	1m 33s
test / py312-cov-xdist (ubuntu-latest)	2m 20s
test / py311-xdist (macos-latest)	1m 42s
test_downstream / py311-jwst-cov-xdist (ubuntu-latest)	30m 45s
test_downstream / py311-romancal-cov-xdist (ubuntu-latest)	4m 54s
	49m 41s

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