Remove TypeType exception for abstract instantiation #13833

Job	Run time
Test mypyc suite with 32-bit Python	6m 56s
Test suite with py38-ubuntu, mypyc-compiled	18m 21s
Test suite with py38-windows-64	20m 2s
Test suite with py39-ubuntu	17m 35s
Test suite with py310-ubuntu	16m 23s
Test suite with py311-ubuntu, mypyc-compiled	15m 57s
Test suite with py312-ubuntu, mypyc-compiled	18m 15s
Test suite with py313-ubuntu, mypyc-compiled	18m 32s
mypyc runtime tests with py39-macos	5m 37s
Type check our own code (py38-ubuntu)	1m 58s
Type check our own code (py38-windows-64)	2m 18s
Formatting and code style with Black + ruff	52s
	2h 22m 46s

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