Remove TypeType exception for protocol instantiation #14250

Job	Run time
Test mypyc suite with 32-bit Python	7m 13s
Test suite with py39-ubuntu, mypyc-compiled	18m 10s
Test suite with py39-windows-64	22m 28s
Test suite with py310-ubuntu	17m 14s
Test suite with py311-ubuntu, mypyc-compiled	16m 44s
Test suite with py312-ubuntu, mypyc-compiled	18m 9s
Test suite with py313-ubuntu, mypyc-compiled	18m 25s
mypyc runtime tests with py39-macos	4m 38s
Type check our own code (py39-ubuntu)	1m 51s
Type check our own code (py39-windows-64)	2m 30s
Formatting and code style with Black + ruff	55s
	2h 8m 17s

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