Tests

Improve decorator type error message for decorated functions (#16295) #19684

Job	Run time
Test mypyc suite with 32-bit Python	6m 45s
Test suite with py314-ubuntu, mypyc-compiled	1m 5s
Test suite with py314-windows-64	6m 39s
Test suite with py310-ubuntu, mypyc-compiled	1m 11s
Test suite with py312-ubuntu	6m 42s
Test suite with py313-ubuntu, mypyc-compiled	1m 1s
mypyc runtime tests with py310-ubuntu	5m 9s
Parallel tests with py314-ubuntu, mypyc-compiled	1m 4s
Test suite with py311-ubuntu	6m 41s
Test suite with py314t-ubuntu, mypyc-compiled	1m 28s
Type check our own code (py310-ubuntu)	1m 31s
mypyc runtime tests with py313-macos	5m 49s
Formatting and code style with Black + ruff	1m 53s
Type check our own code (py310-windows-64)	2m 28s
Parallel tests with py314-ubuntu, interpreted	6m 42s
	56m 8s

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