Tests

Fail fast when user tries to generate reports with parallel workers #21980

Job	Run time
Test mypyc suite with 32-bit Python	10m 17s
Test suite with py314-ubuntu, mypyc-compiled	15m 18s
mypyc runtime tests with py313-macos	5m 10s
Test suite with py312-ubuntu	9m 41s
Test suite with py311-ubuntu	9m 32s
Parallel tests with py314-ubuntu, interpreted	27m 17s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 57s
Test suite with py313-ubuntu, mypyc-compiled	16m 37s
mypyc runtime tests with py310-ubuntu	6m 34s
Test suite with py314t-ubuntu, mypyc-compiled	17m 35s
Test suite with py314-windows-64	32m 1s
Type check our own code (py310-windows-64)	1m 39s
Type check our own code (py310-ubuntu)	52s
Test suite with py310-ubuntu, mypyc-compiled	16m 0s
Formatting and code style with Black + ruff	1m 49s
Parallel tests with py314-windows-64, interpreted	10m 41s
	3h 30m 0s

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