Tests

[stubtest] Fix false positives for type[TypeVar] defaults #21402

Job	Run time
Test mypyc suite with 32-bit Python	9m 55s
Test suite with py312-ubuntu	9m 27s
Test suite with py310-ubuntu, mypyc-compiled	16m 13s
Test suite with py314t-ubuntu, mypyc-compiled	18m 26s
Test suite with py311-ubuntu	9m 50s
Test suite with py314-ubuntu, mypyc-compiled	15m 39s
Test suite with py313-ubuntu, mypyc-compiled	15m 35s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-ubuntu)	1m 47s
mypyc runtime tests with py313-macos	4m 15s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 47s
Test suite with py314-windows-64	29m 18s
Parallel tests with py314-windows-64, interpreted	10m 13s
Type check our own code (py310-windows-64)	2m 39s
Parallel tests with py314-ubuntu, interpreted	22m 33s
mypyc runtime tests with py310-ubuntu	5m 36s
	3h 21m 5s

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