chore: use pytest 9+, default to that #2089

Job	Run time
change-detection / Identify source changes	7s
rr-tests / Action	19s
rr-tests / Run pylint	18s
cookie / Distribution build	7m 22s
cookie / Check included Noxfile	3m 42s
cookie / Format	6m 25s
rr-tests / Run cog on README	12s
cookie / Check Python 3.10 on macos-latest	2m 49s
cookie / Check Python 3.10 on windows-latest	3m 43s
cookie / Check Python 3.14 on ubuntu-latest	3m 14s
cookie / Check Python 3.14 on windows-latest	4m 4s
cookie / Check Python pypy-3.11 on ubuntu-latest	2m 24s
cookie / Check Python 3.14 on macos-latest	2m 22s
cookie / Check Python 3.14 on macos-15-intel	4m 21s
cookie / Check Python 3.10 on macos-15-intel	4m 11s
rr-tests / Check Python 3.12 on macos-latest	35s
rr-tests / Check Python 3.12 on ubuntu-latest	26s
cookie / Check Python 3.10 on ubuntu-latest	3m 10s
rr-tests / Check Python 3.14 on macos-15-intel	1m 0s
rr-tests / Check Python 3.10 on macos-latest	49s
rr-tests / Check Python 3.10 on macos-15-intel	58s
rr-tests / Check Python 3.14 on macos-latest	28s
rr-tests / Check Python 3.14 on ubuntu-latest	34s
rr-tests / Check Python 3.10 on windows-latest	43s
rr-tests / Check Python 3.14 on windows-latest	45s
rr-tests / Check Python 3.10 on ubuntu-latest	26s
rr-tests / Check Python 3.12 on macos-15-intel	1m 3s
rr-tests / Check Python 3.12 on windows-latest	51s
cookie / pass	3s
pass	2s
	57m 26s

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