Tests

Add functools.lru_cache plugin support Fixes #16261 #19858

Job	Run time
Test mypyc suite with 32-bit Python	8m 25s
Test suite with py310-ubuntu, mypyc-compiled	13m 55s
Test suite with py312-ubuntu	9m 38s
Test suite with py313-ubuntu, mypyc-compiled	13m 31s
Test suite with py311-ubuntu	9m 27s
mypyc runtime tests with py313-macos	5m 41s
mypyc runtime tests with py310-ubuntu	5m 5s
Test suite with py314t-ubuntu, mypyc-compiled	15m 33s
Parallel tests with py314-ubuntu, interpreted	16m 47s
Parallel tests with py314-ubuntu, mypyc-compiled	16m 48s
Type check our own code (py310-ubuntu)	1m 29s
Type check our own code (py310-windows-64)	2m 32s
Formatting and code style with Black + ruff	1m 54s
Test suite with py314-windows-64	16m 41s
Test suite with py314-ubuntu, mypyc-compiled	14m 19s
	2h 31m 45s

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