Tests

Write serialized options to a file to broadcast to workers #21897

Job	Run time
Test mypyc suite with 32-bit Python	11m 9s
Test suite with py313-ubuntu, mypyc-compiled	15m 19s
mypyc runtime tests with py313-macos	6m 11s
Test suite with py312-ubuntu	9m 50s
Test suite with py311-ubuntu	9m 11s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 25s
Test suite with py310-ubuntu, mypyc-compiled	16m 27s
Test suite with py314t-ubuntu, mypyc-compiled	17m 25s
Type check our own code (py310-ubuntu)	1m 15s
Type check our own code (py310-windows-64)	2m 31s
Formatting and code style with Black + ruff	1m 51s
Test suite with py314-windows-64	30m 51s
Parallel tests with py314-windows-64, interpreted	12m 25s
Parallel tests with py314-ubuntu, interpreted	24m 2s
mypyc runtime tests with py310-ubuntu	6m 22s
Test suite with py314-ubuntu, mypyc-compiled	15m 25s
	3h 28m 39s

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