Tests

Improve decorator type error message for decorated functions (#16295) #19670

Job	Run time
Test mypyc suite with 32-bit Python	1m 32s
Test suite with py311-ubuntu	1m 42s
Test suite with py312-ubuntu	1m 42s
Test suite with py310-ubuntu, mypyc-compiled	1m 11s
Test suite with py313-ubuntu, mypyc-compiled	1m 1s
Test suite with py314t-ubuntu, mypyc-compiled	1m 19s
Test suite with py314-windows-64	1m 36s
mypyc runtime tests with py310-ubuntu	1m 45s
Test suite with py314-ubuntu, mypyc-compiled	1m 3s
Parallel tests with py314-ubuntu, interpreted	1m 42s
mypyc runtime tests with py313-macos	1m 47s
Type check our own code (py310-ubuntu)	1m 29s
Formatting and code style with Black + ruff	1m 45s
Type check our own code (py310-windows-64)	1m 34s
Parallel tests with py314-ubuntu, mypyc-compiled	1m 5s
	22m 13s

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