Tests

Fix librt compilation on platforms with OpenMP (#20583) #20131

Job	Run time
Test mypyc suite with 32-bit Python	9m 33s
Test suite with py311-ubuntu	9m 16s
Test suite with py312-ubuntu	9m 49s
Test suite with py313-ubuntu, mypyc-compiled	15m 28s
Test suite with py314-ubuntu, mypyc-compiled	14m 34s
Formatting and code style with Black + ruff	2m 3s
Test suite with py310-ubuntu, mypyc-compiled	15m 30s
mypyc runtime tests with py313-macos	4m 31s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 20s
Parallel tests with py314-ubuntu, interpreted	23m 46s
Test suite with py314-windows-64	26m 6s
Type check our own code (py310-ubuntu)	1m 44s
mypyc runtime tests with py310-ubuntu	5m 40s
Test suite with py314t-ubuntu, mypyc-compiled	17m 37s
Type check our own code (py310-windows-64)	2m 13s
	3h 7m 10s

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