Allow TypedDict unpacking in Callable types #11092

Job	Run time
Test mypyc suite with 32-bit Python	10m 29s
Test suite with py38-ubuntu, mypyc-compiled	29m 46s
Test suite with py38-windows-64	32m 44s
Test suite with py39-ubuntu	28m 15s
Test suite with py310-ubuntu	23m 34s
Test suite with py311-ubuntu, mypyc-compiled	19m 41s
Test suite with py312-ubuntu, mypyc-compiled	24m 51s
mypyc runtime tests with py38-macos	7m 37s
mypyc runtime tests with py38-debug-build-ubuntu	6m 44s
Type check our own code (py38-ubuntu)	2m 10s
Type check our own code (py38-windows-64)	3m 3s
Formatting and code style with Black + ruff	53s
	3h 9m 47s

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