Test

Add Python 3.15 test infrastructure #35974

Job	Run time
mypy: Run test cases	2m 47s
stub_uploader tests	2m 43s
Check typeshed structure	16s
pyright: Run test cases (Linux, 3.13)	1m 23s
pyright: Run test cases (Linux, 3.14)	1m 27s
pyright: Run test cases (Linux, 3.12)	1m 25s
pyright: Run test cases (Windows, 3.13)	1m 27s
pyright: Run test cases (Windows, 3.14)	1m 25s
pyright: Run test cases (Darwin, 3.13)	1m 33s
pyright: Run test cases (Windows, 3.15)	42s
pyright: Run test cases (Windows, 3.11)	1m 22s
pyright: Run test cases (Linux, 3.11)	1m 29s
mypy: Check stubs (win32, 3.14)	2m 6s
mypy: Check stubs (linux, 3.12)	2m 19s
mypy: Check stubs (linux, 3.10)	2m 4s
mypy: Check stubs (darwin, 3.13)	2m 19s
mypy: Check stubs (darwin, 3.14)	2m 13s
pyright: Run test cases (Darwin, 3.14)	1m 51s
pyright: Run test cases (Linux, 3.15)	53s
mypy: Check stubs (win32, 3.10)	2m 36s
mypy: Check stubs (linux, 3.14)	2m 10s
mypy: Check stubs (darwin, 3.10)	1m 56s
mypy: Check stubs (linux, 3.13)	1m 53s
mypy: Check stubs (linux, 3.15)	2m 41s
mypy: Check stubs (win32, 3.12)	2m 29s
mypy: Check stubs (win32, 3.11)	1m 52s
mypy: Check stubs (darwin, 3.12)	2m 38s
mypy: Check stubs (win32, 3.13)	2m 2s
pyright: Run test cases (Darwin, 3.15)	40s
mypy: Check stubs (darwin, 3.11)	1m 54s
mypy: Check stubs (darwin, 3.15)	2m 48s
pyright: Run test cases (Darwin, 3.11)	1m 43s
pyright: Run test cases (Windows, 3.12)	1m 22s
pyright: Run test cases (Darwin, 3.12)	1m 37s
mypy: Check stubs (linux, 3.11)	1m 41s
mypy: Check stubs (win32, 3.15)	2m 41s
	1h 6m 27s

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