Tests

[mypyc] Add note about librt.strings thread safety (#21383) #22070

Job	Run time
Test mypyc suite with 32-bit Python	47m 23s
Test suite with py310-ubuntu, mypyc-compiled	15m 59s
Test suite with py314t-ubuntu, mypyc-compiled	18m 29s
Test suite with py311-ubuntu	9m 10s
Test suite with py312-ubuntu	9m 58s
mypyc runtime tests with py310-ubuntu	6m 59s
Test suite with py314-ubuntu, mypyc-compiled	16m 26s
Test suite with py313-ubuntu, mypyc-compiled	15m 33s
Parallel tests with py314-ubuntu, interpreted	27m 47s
Parallel tests with py314-windows-64, interpreted	10m 57s
Type check our own code (py310-ubuntu)	1m 4s
Test suite with py314-windows-64	28m 37s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 34s
mypyc runtime tests with py313-macos	6m 25s
Formatting and code style with Black + ruff	1m 35s
Type check our own code (py310-windows-64)	1m 55s
	4h 6m 51s

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