mypy

gh-145056: Fix merging of collections.OrderedDict and frozendict (GH-… #20270

Job	Run time
Run mypy on Lib/test/libregrtest	17s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/clinic	22s
Run mypy on Tools/build	17s
Run mypy on Tools/jit	22s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/tomllib	20s
Run mypy on Tools/peg_generator	19s
	2m 52s

Provide feedback