Test

Make ObjectStore backend generic over any obspec store #6127

Job	Run time
py=3.13-upstream	7m 12s
doctests	1m 14s
os=ubuntu-latest, py=3.11, deps=minimal	33s
os=ubuntu-latest, py=3.12, deps=optional	38s
os=ubuntu-latest, py=3.13, deps=optional	43s
os=ubuntu-latest, py=3.13, deps=minimal	32s
os=ubuntu-latest, py=3.11, deps=optional	40s
os=macos-latest, py=3.13, deps=optional	41s
os=windows-latest, py=3.11, deps=optional	37s
os=windows-latest, py=3.13, deps=optional	38s
os=ubuntu-latest, py=3.12, deps=minimal	34s
py=3.11-min_deps	6m 45s
os=macos-latest, py=3.11, deps=optional	46s
Test complete	2s
	21m 35s

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