Test

Add `@type_check_only` to stub-only private classes in stdlib, round 2 #35326

Job	Run time
stub_uploader tests	5m 24s
mypy: Run test cases	5m 45s
Check typeshed structure	12s
pyright: Run test cases (Linux, 3.11)	1m 22s
pyright: Run test cases (Windows, 3.11)	1m 23s
pyright: Run test cases (Linux, 3.12)	1m 37s
pyright: Run test cases (Windows, 3.14)	1m 22s
pyright: Run test cases (Darwin, 3.12)	1m 26s
pyright: Run test cases (Windows, 3.12)	1m 18s
pyright: Run test cases (Linux, 3.13)	1m 25s
pyright: Run test cases (Windows, 3.13)	1m 36s
pyright: Run test cases (Linux, 3.14)	1m 30s
pyright: Run test cases (Darwin, 3.11)	1m 22s
pyright: Run test cases (Darwin, 3.13)	1m 37s
pyright: Run test cases (Darwin, 3.14)	1m 31s
mypy: Check stubs (win32, 3.10)	2m 40s
mypy: Check stubs (win32, 3.14)	2m 53s
mypy: Check stubs (win32, 3.12)	2m 44s
mypy: Check stubs (linux, 3.10)	2m 54s
mypy: Check stubs (darwin, 3.10)	2m 38s
mypy: Check stubs (win32, 3.13)	2m 52s
mypy: Check stubs (win32, 3.11)	2m 31s
mypy: Check stubs (darwin, 3.11)	2m 34s
mypy: Check stubs (linux, 3.13)	2m 49s
mypy: Check stubs (linux, 3.12)	2m 54s
mypy: Check stubs (linux, 3.11)	2m 21s
mypy: Check stubs (linux, 3.14)	2m 43s
mypy: Check stubs (darwin, 3.13)	2m 40s
mypy: Check stubs (darwin, 3.14)	2m 49s
mypy: Check stubs (darwin, 3.12)	2m 46s
	1h 9m 38s

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