JIT

gh-131798: JIT: Narrow the return type of `isinstance` for some known arguments #3341

Job	Run time
Interpreter (Debug)	9m 24s
i686-pc-windows-msvc/msvc (Debug)	20m 7s
Free-Threaded (Debug) (19)	13m 41s
i686-pc-windows-msvc/msvc (Release)	12m 38s
x86_64-pc-windows-msvc/msvc (Debug)	20m 17s
x86_64-pc-windows-msvc/msvc (Release)	12m 29s
aarch64-pc-windows-msvc/msvc (Debug)	21m 2s
aarch64-pc-windows-msvc/msvc (Release)	19m 9s
x86_64-apple-darwin/clang (Debug)	21m 0s
x86_64-apple-darwin/clang (Release)	14m 53s
aarch64-apple-darwin/clang (Debug)	9m 20s
aarch64-apple-darwin/clang (Release)	8m 13s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 27s
x86_64-unknown-linux-gnu/gcc (Release)	6m 15s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 29s
aarch64-unknown-linux-gnu/gcc (Release)	8m 14s
	3h 34m 38s

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