Test

Prevent update_attributes from erasing all prior attributes #3257

Job	Run time
doctests	1m 2s
py=3.11-min_deps	6m 0s
py=3.13-upstream	7m 53s
os=ubuntu-latest, py=3.11, np=1.25, deps=minimal	7m 38s
os=ubuntu-latest, py=3.11, np=1.25, deps=optional	7m 39s
os=ubuntu-latest, py=3.11, np=2.1, deps=minimal	7m 24s
os=ubuntu-latest, py=3.11, np=2.1, deps=optional	7m 42s
os=ubuntu-latest, py=3.12, np=1.25, deps=minimal	8m 38s
os=ubuntu-latest, py=3.12, np=1.25, deps=optional	8m 36s
os=ubuntu-latest, py=3.12, np=2.1, deps=minimal	9m 1s
os=ubuntu-latest, py=3.12, np=2.1, deps=optional	8m 22s
os=ubuntu-latest, py=3.13, np=1.25, deps=minimal	11m 53s
os=ubuntu-latest, py=3.13, np=1.25, deps=optional	11m 45s
os=ubuntu-latest, py=3.13, np=2.1, deps=minimal	8m 39s
os=ubuntu-latest, py=3.13, np=2.1, deps=optional	8m 36s
os=macos-latest, py=3.11, np=1.25, deps=optional	6m 6s
os=macos-latest, py=3.13, np=2.1, deps=optional	6m 5s
os=windows-latest, py=3.11, np=1.25, deps=optional	12m 25s
os=windows-latest, py=3.13, np=2.1, deps=optional	12m 9s
Test complete	1s
	2h 37m 34s

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