Test

Adding `copy_store` convenience method for `Group` #5965

Job	Run time
py=3.13-upstream	9m 7s
py=3.11-min_deps	4m 36s
os=ubuntu-latest, py=3.12, np=1.26, deps=minimal	4m 20s
os=ubuntu-latest, py=3.11, np=1.26, deps=optional	4m 13s
os=ubuntu-latest, py=3.11, np=2.2, deps=optional	4m 11s
os=ubuntu-latest, py=3.11, np=2.2, deps=minimal	4m 8s
os=ubuntu-latest, py=3.12, np=1.26, deps=optional	4m 45s
doctests	1m 6s
os=ubuntu-latest, py=3.11, np=1.26, deps=minimal	4m 13s
os=ubuntu-latest, py=3.12, np=2.2, deps=optional	4m 33s
os=ubuntu-latest, py=3.13, np=1.26, deps=optional	7m 6s
os=macos-latest, py=3.11, np=1.26, deps=optional	4m 51s
os=ubuntu-latest, py=3.12, np=2.2, deps=minimal	4m 6s
os=windows-latest, py=3.11, np=1.26, deps=optional	6m 37s
os=windows-latest, py=3.13, np=2.2, deps=optional	7m 1s
os=ubuntu-latest, py=3.13, np=2.2, deps=minimal	4m 14s
os=macos-latest, py=3.13, np=2.2, deps=optional	3m 37s
os=ubuntu-latest, py=3.13, np=2.2, deps=optional	4m 20s
os=ubuntu-latest, py=3.13, np=1.26, deps=minimal	7m 15s
Test complete	2s
	1h 34m 21s

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