Test

Add Python 3.15 test infrastructure #35996

Job	Run time
stub_uploader tests	5m 3s
mypy: Run test cases	16m 13s
Check typeshed structure	14s
pyright: Run test cases (Windows, 3.11)	4m 59s
pyright: Run test cases (Darwin, 3.13)	4m 30s
pyright: Run test cases (Darwin, 3.14)	1m 32s
pyright: Run test cases (Linux, 3.14)	1m 23s
pyright: Run test cases (Windows, 3.12)	1m 46s
pyright: Run test cases (Windows, 3.14)	1m 31s
pyright: Run test cases (Linux, 3.12)	1m 38s
pyright: Run test cases (Darwin, 3.12)	1m 32s
pyright: Run test cases (Darwin, 3.11)	1m 24s
pyright: Run test cases (Windows, 3.13)	1m 31s
pyright: Run test cases (Linux, 3.13)	1m 27s
pyright: Run test cases (Linux, 3.11)	1m 33s
mypy: Check stubs (linux, 3.12)	2m 3s
mypy: Check stubs (win32, 3.10)	2m 19s
mypy: Check stubs (linux, 3.14)	1m 57s
mypy: Check stubs (linux, 3.13)	1m 56s
mypy: Check stubs (win32, 3.14)	2m 6s
mypy: Check stubs (linux, 3.15)	4m 32s
mypy: Check stubs (win32, 3.12)	2m 11s
mypy: Check stubs (darwin, 3.12)	2m 1s
mypy: Check stubs (win32, 3.13)	1m 58s
mypy: Check stubs (win32, 3.15)	4m 37s
mypy: Check stubs (linux, 3.10)	2m 25s
mypy: Check stubs (darwin, 3.14)	2m 9s
mypy: Check stubs (darwin, 3.11)	1m 50s
mypy: Check stubs (win32, 3.11)	2m 2s
mypy: Check stubs (darwin, 3.10)	1m 56s
mypy: Check stubs (darwin, 3.15)	4m 40s
mypy: Check stubs (darwin, 3.13)	5m 51s
mypy: Check stubs (linux, 3.11)	1m 52s
	1h 34m 41s

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