Add Python 3.15 profiling stubs #15254

Job	Run time
stubtest: stdlib (ubuntu-latest, 3.10)	33s
stubtest: stdlib (ubuntu-latest, 3.11)	42s
stubtest: stdlib (windows-latest, 3.11)	1m 19s
stubtest: stdlib (ubuntu-latest, 3.13)	34s
stubtest: stdlib (ubuntu-latest, 3.15)	47s
stubtest: stdlib (ubuntu-latest, 3.12)	34s
stubtest: stdlib (windows-latest, 3.13)	1m 19s
stubtest: stdlib (ubuntu-latest, 3.14)	33s
stubtest: stdlib (windows-latest, 3.15)	1m 40s
stubtest: stdlib (macos-latest, 3.15)	40s
stubtest: stdlib (windows-latest, 3.14)	1m 9s
stubtest: stdlib (macos-latest, 3.10)	57s
stubtest: stdlib (windows-latest, 3.12)	1m 10s
stubtest: stdlib (macos-latest, 3.13)	24s
stubtest: stdlib (macos-latest, 3.11)	25s
stubtest: stdlib (macos-latest, 3.12)	30s
stubtest: stdlib (macos-latest, 3.14)	23s
	13m 39s

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