Tests

[mypyc] Add `librt.strings.isidentifier` codepoint primitive #22368

Job	Run time
Test mypyc suite with 32-bit Python	11m 22s
Test suite with py313-ubuntu, mypyc-compiled	15m 42s
mypyc runtime tests with py310-ubuntu	7m 26s
Test suite with py314t-ubuntu, mypyc-compiled	18m 38s
Test suite with py314-windows-64	31m 22s
Test suite with py312-ubuntu	10m 13s
mypyc runtime tests with py313-macos	6m 39s
Type check our own code (py310-windows-64)	2m 18s
Test suite with py314-ubuntu, mypyc-compiled	16m 15s
Test suite with py310-ubuntu, mypyc-compiled	17m 19s
Test suite with py311-ubuntu	9m 40s
Type check our own code (py310-ubuntu)	1m 9s
Formatting and code style with Black + ruff	2m 0s
Parallel tests with py314-windows-64, interpreted	12m 9s
Test suite with py315-ubuntu, mypyc-compiled	15m 33s
Parallel tests with py314-ubuntu, mypyc-compiled	31m 46s
Parallel tests with py314-ubuntu, interpreted	28m 33s
	3h 58m 4s

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