Tests

[stubtest] ignore `__conditional_annotations__` (#20392) #19699

Job	Run time
Test mypyc suite with 32-bit Python	9m 20s
Test suite with py313-ubuntu, mypyc-compiled	14m 7s
Test suite with py314t-ubuntu, mypyc-compiled	16m 3s
Test suite with py314-ubuntu, mypyc-compiled	13m 41s
Test suite with py314-windows-64	27m 0s
mypyc runtime tests with py310-ubuntu	5m 11s
Parallel tests with py314-ubuntu, interpreted	22m 13s
Type check our own code (py310-windows-64)	2m 38s
Test suite with py311-ubuntu	9m 3s
Test suite with py312-ubuntu	9m 59s
Parallel tests with py314-ubuntu, mypyc-compiled	25m 23s
Type check our own code (py310-ubuntu)	1m 49s
Formatting and code style with Black + ruff	2m 2s
mypyc runtime tests with py313-macos	4m 20s
Test suite with py310-ubuntu, mypyc-compiled	14m 30s
	2h 57m 19s

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