Add small Python 3.15 stdlib updates #15179

Job	Run time
stubtest: stdlib (ubuntu-latest, 3.10)	38s
stubtest: stdlib (ubuntu-latest, 3.13)	38s
stubtest: stdlib (windows-latest, 3.12)	1m 23s
stubtest: stdlib (ubuntu-latest, 3.15)	53s
stubtest: stdlib (ubuntu-latest, 3.12)	34s
stubtest: stdlib (macos-latest, 3.10)	59s
stubtest: stdlib (ubuntu-latest, 3.11)	37s
stubtest: stdlib (windows-latest, 3.13)	1m 41s
stubtest: stdlib (windows-latest, 3.11)	1m 6s
stubtest: stdlib (macos-latest, 3.15)	45s
stubtest: stdlib (macos-latest, 3.11)	35s
stubtest: stdlib (windows-latest, 3.14)	1m 49s
stubtest: stdlib (macos-latest, 3.12)	56s
stubtest: stdlib (macos-latest, 3.14)	28s
stubtest: stdlib (macos-latest, 3.13)	27s
stubtest: stdlib (ubuntu-latest, 3.14)	36s
stubtest: stdlib (windows-latest, 3.15)	2m 0s
	16m 5s

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