Tests

Fix issue #20821 #20876

Job	Run time
Test mypyc suite with 32-bit Python	9m 24s
Test suite with py314-windows-64	25m 35s
Test suite with py310-ubuntu, mypyc-compiled	6m 8s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-windows-64)	2m 59s
Test suite with py312-ubuntu	8m 54s
mypyc runtime tests with py313-macos	4m 20s
Test suite with py311-ubuntu	8m 35s
Parallel tests with py314-ubuntu, mypyc-compiled	5m 0s
mypyc runtime tests with py310-ubuntu	5m 10s
Test suite with py313-ubuntu, mypyc-compiled	4m 42s
Parallel tests with py314-windows-64, interpreted	10m 33s
Test suite with py314t-ubuntu, mypyc-compiled	6m 6s
Test suite with py314-ubuntu, mypyc-compiled	4m 55s
Parallel tests with py314-ubuntu, interpreted	22m 48s
Type check our own code (py310-ubuntu)	1m 42s
	2h 8m 43s

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