Tests

Use proper fixed format for parallel type checking IPC #20082

Job	Run time
Test mypyc suite with 32-bit Python	9m 34s
Test suite with py314-ubuntu, mypyc-compiled	15m 34s
Test suite with py314-windows-64	27m 20s
Test suite with py310-ubuntu, mypyc-compiled	15m 2s
Test suite with py314t-ubuntu, mypyc-compiled	17m 29s
Test suite with py311-ubuntu	9m 14s
mypyc runtime tests with py313-macos	5m 32s
Test suite with py313-ubuntu, mypyc-compiled	14m 14s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 44s
Parallel tests with py314-ubuntu, interpreted	23m 1s
Type check our own code (py310-windows-64)	2m 37s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-ubuntu)	1m 41s
Test suite with py312-ubuntu	9m 53s
mypyc runtime tests with py310-ubuntu	5m 43s
	3h 7m 30s

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