Tests

Allow nativeparse to parse source code directly #21994

Job	Run time
Test mypyc suite with 32-bit Python	10m 13s
Test suite with py314-ubuntu, mypyc-compiled	1m 7s
Test suite with py314t-ubuntu, mypyc-compiled	1m 24s
Test suite with py313-ubuntu, mypyc-compiled	1m 10s
Test suite with py311-ubuntu	9m 4s
Parallel tests with py314-ubuntu, mypyc-compiled	1m 9s
Test suite with py312-ubuntu	10m 4s
Type check our own code (py310-ubuntu)	32s
Test suite with py314-windows-64	30m 14s
Formatting and code style with Black + ruff	1m 56s
mypyc runtime tests with py313-macos	7m 24s
Test suite with py310-ubuntu, mypyc-compiled	1m 31s
Type check our own code (py310-windows-64)	3m 3s
mypyc runtime tests with py310-ubuntu	6m 49s
Parallel tests with py314-ubuntu, interpreted	20m 44s
Parallel tests with py314-windows-64, interpreted	8m 35s
	1h 54m 59s

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