Tests

Disable GC freeze hack in parallel workers (#21207) #21657

Job	Run time
Test mypyc suite with 32-bit Python	10m 17s
Test suite with py314-ubuntu, mypyc-compiled	15m 8s
Test suite with py311-ubuntu	8m 49s
Test suite with py313-ubuntu, mypyc-compiled	14m 41s
Test suite with py314-windows-64	27m 48s
Test suite with py312-ubuntu	9m 56s
Test suite with py310-ubuntu, mypyc-compiled	15m 31s
Test suite with py314t-ubuntu, mypyc-compiled	17m 50s
mypyc runtime tests with py313-macos	4m 37s
Type check our own code (py310-ubuntu)	1m 51s
mypyc runtime tests with py310-ubuntu	6m 15s
Parallel tests with py314-ubuntu, interpreted	24m 42s
Parallel tests with py314-windows-64, interpreted	10m 38s
Formatting and code style with Black + ruff	1m 49s
Type check our own code (py310-windows-64)	2m 12s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 19s
	3h 19m 23s

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