Added CLI support for Mypy Plugins #13996

Job	Run time
Test mypyc suite with 32-bit Python	7m 11s
Test suite with py38-ubuntu, mypyc-compiled	18m 2s
Test suite with py38-windows-64	20m 41s
Test suite with py39-ubuntu	17m 24s
Test suite with py310-ubuntu	16m 51s
Test suite with py311-ubuntu, mypyc-compiled	15m 59s
Test suite with py312-ubuntu, mypyc-compiled	18m 25s
Test suite with py313-ubuntu, mypyc-compiled	18m 40s
mypyc runtime tests with py39-macos	5m 40s
Type check our own code (py38-ubuntu)	1m 51s
Type check our own code (py38-windows-64)	2m 31s
Formatting and code style with Black + ruff	52s
	2h 24m 7s

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