Filter to possible package paths before trying to resolve a module (#… #13729

Job	Run time
Test suite with py38-ubuntu, mypyc-compiled	17m 24s
Test mypyc suite with 32-bit Python	7m 6s
Test suite with py38-windows-64	19m 59s
Test suite with py39-ubuntu	16m 38s
Test suite with py310-ubuntu	15m 52s
Test suite with py311-ubuntu, mypyc-compiled	15m 32s
Test suite with py312-ubuntu, mypyc-compiled	17m 44s
Test suite with py313-ubuntu, mypyc-compiled	18m 14s
mypyc runtime tests with py39-macos	5m 1s
Type check our own code (py38-ubuntu)	1m 52s
Type check our own code (py38-windows-64)	2m 25s
Formatting and code style with Black + ruff	36s
	2h 18m 23s

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