Disallow calling type on Protocol #13831

Job	Run time
Test mypyc suite with 32-bit Python	7m 21s
Test suite with py38-ubuntu, mypyc-compiled	18m 27s
Test suite with py38-windows-64	20m 6s
Test suite with py39-ubuntu	16m 50s
Test suite with py310-ubuntu	16m 24s
Test suite with py311-ubuntu, mypyc-compiled	16m 8s
Test suite with py312-ubuntu, mypyc-compiled	18m 45s
Test suite with py313-ubuntu, mypyc-compiled	18m 21s
mypyc runtime tests with py39-macos	4m 45s
Type check our own code (py38-ubuntu)	1m 56s
Type check our own code (py38-windows-64)	2m 48s
Formatting and code style with Black + ruff	53s
	2h 22m 44s

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