Tests

Fix unaligned memory access in librt internal helper function _write_… #20051

Job	Run time
Test mypyc suite with 32-bit Python	9m 38s
Test suite with py311-ubuntu	9m 23s
Test suite with py314-ubuntu, mypyc-compiled	14m 25s
Test suite with py314-windows-64	26m 51s
Test suite with py312-ubuntu	9m 56s
Parallel tests with py314-ubuntu, interpreted	23m 57s
Test suite with py313-ubuntu, mypyc-compiled	14m 22s
mypyc runtime tests with py310-ubuntu	5m 19s
Test suite with py310-ubuntu, mypyc-compiled	13m 59s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-windows-64)	2m 22s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 3s
Test suite with py314t-ubuntu, mypyc-compiled	15m 9s
Type check our own code (py310-ubuntu)	1m 40s
mypyc runtime tests with py313-macos	4m 19s
	3h 2m 15s

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