Tests

Enable strict_bytes by default #20607

Job	Run time
Test mypyc suite with 32-bit Python	9m 34s
Test suite with py313-ubuntu, mypyc-compiled	15m 7s
Test suite with py314-windows-64	27m 9s
Test suite with py314-ubuntu, mypyc-compiled	14m 29s
Type check our own code (py310-ubuntu)	1m 43s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 12s
Test suite with py312-ubuntu	8m 47s
Test suite with py311-ubuntu	8m 40s
mypyc runtime tests with py313-macos	6m 0s
Test suite with py310-ubuntu, mypyc-compiled	14m 32s
mypyc runtime tests with py310-ubuntu	5m 34s
Parallel tests with py314-ubuntu, interpreted	25m 4s
Test suite with py314t-ubuntu, mypyc-compiled	17m 9s
Formatting and code style with Black + ruff	1m 56s
Type check our own code (py310-windows-64)	2m 23s
	3h 7m 19s

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