Tests

Bump ast-serialize cache version #22083

Job	Run time
Test mypyc suite with 32-bit Python	11m 20s
Test suite with py314t-ubuntu, mypyc-compiled	18m 22s
mypyc runtime tests with py310-ubuntu	6m 58s
Test suite with py310-ubuntu, mypyc-compiled	16m 53s
Test suite with py314-ubuntu, mypyc-compiled	15m 58s
Test suite with py313-ubuntu, mypyc-compiled	15m 32s
Test suite with py314-windows-64	27m 53s
mypyc runtime tests with py313-macos	5m 33s
Test suite with py312-ubuntu	9m 26s
Test suite with py311-ubuntu	9m 37s
Parallel tests with py314-ubuntu, interpreted	25m 42s
Type check our own code (py310-ubuntu)	1m 15s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 16s
Type check our own code (py310-windows-64)	2m 23s
Formatting and code style with Black + ruff	1m 42s
Parallel tests with py314-windows-64, interpreted	11m 2s
	3h 28m 52s

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