Tests

Fix: internal error caused by the generic type alias with an unpacked list #20496

Job	Run time
Test mypyc suite with 32-bit Python	9m 44s
Test suite with py311-ubuntu	8m 37s
Test suite with py310-ubuntu, mypyc-compiled	15m 9s
Parallel tests with py314-ubuntu, interpreted	22m 8s
Test suite with py314-ubuntu, mypyc-compiled	13m 23s
Test suite with py314t-ubuntu, mypyc-compiled	16m 50s
Test suite with py314-windows-64	22m 1s
Type check our own code (py310-ubuntu)	1m 28s
mypyc runtime tests with py313-macos	6m 35s
Type check our own code (py310-windows-64)	2m 22s
Test suite with py312-ubuntu	8m 55s
mypyc runtime tests with py310-ubuntu	5m 21s
Parallel tests with py314-ubuntu, mypyc-compiled	22m 6s
Formatting and code style with Black + ruff	1m 49s
Test suite with py313-ubuntu, mypyc-compiled	15m 19s
	2h 51m 47s

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