Tests

Allow `types.NoneType` in match cases #19674

Job	Run time
Test mypyc suite with 32-bit Python	8m 37s
Test suite with py310-ubuntu, mypyc-compiled	14m 2s
Test suite with py311-ubuntu	8m 58s
Test suite with py313-ubuntu, mypyc-compiled	13m 47s
Test suite with py314-ubuntu, mypyc-compiled	14m 20s
Test suite with py312-ubuntu	10m 6s
Parallel tests with py314-ubuntu, interpreted	22m 57s
Test suite with py314t-ubuntu, mypyc-compiled	15m 39s
Test suite with py314-windows-64	26m 22s
mypyc runtime tests with py310-ubuntu	5m 21s
mypyc runtime tests with py313-macos	4m 30s
Formatting and code style with Black + ruff	2m 6s
Type check our own code (py310-windows-64)	2m 35s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 50s
Type check our own code (py310-ubuntu)	1m 45s
	2h 58m 55s

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