Test

Various improvements for the mailbox stubs #35259

Job	Run time
Check typeshed structure	14s
stub_uploader tests	5m 20s
mypy: Run test cases	5m 52s
pyright: Run test cases (Windows, 3.12)	1m 23s
pyright: Run test cases (Linux, 3.12)	1m 26s
pyright: Run test cases (Linux, 3.11)	1m 18s
pyright: Run test cases (Linux, 3.13)	1m 25s
pyright: Run test cases (Windows, 3.13)	1m 23s
pyright: Run test cases (Darwin, 3.12)	1m 21s
pyright: Run test cases (Darwin, 3.14)	1m 23s
pyright: Run test cases (Windows, 3.11)	1m 26s
pyright: Run test cases (Darwin, 3.11)	1m 26s
mypy: Check stubs (linux, 3.11)	2m 18s
mypy: Check stubs (win32, 3.10)	2m 35s
pyright: Run test cases (Darwin, 3.13)	1m 30s
pyright: Run test cases (Linux, 3.14)	1m 27s
mypy: Check stubs (win32, 3.11)	2m 24s
mypy: Check stubs (linux, 3.13)	2m 38s
mypy: Check stubs (win32, 3.12)	3m 19s
pyright: Run test cases (Windows, 3.14)	1m 26s
mypy: Check stubs (win32, 3.14)	2m 40s
mypy: Check stubs (linux, 3.14)	2m 39s
mypy: Check stubs (darwin, 3.12)	2m 46s
mypy: Check stubs (darwin, 3.14)	2m 37s
mypy: Check stubs (win32, 3.13)	2m 44s
mypy: Check stubs (darwin, 3.13)	2m 43s
mypy: Check stubs (linux, 3.12)	2m 22s
mypy: Check stubs (darwin, 3.10)	2m 32s
mypy: Check stubs (linux, 3.10)	2m 35s
mypy: Check stubs (darwin, 3.11)	2m 17s
	1h 7m 29s

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