JIT

gh-115999: Add free-threaded specialization for FOR_ITER #2494

Job	Run time
Interpreter (Debug)	8m 9s
Free-Threaded (Debug) (19)	2m 24s
i686-pc-windows-msvc/msvc (Debug)	18m 30s
i686-pc-windows-msvc/msvc (Release)	11m 2s
x86_64-pc-windows-msvc/msvc (Debug)	17m 5s
x86_64-pc-windows-msvc/msvc (Release)	11m 1s
aarch64-pc-windows-msvc/msvc (Debug)	4m 3s
aarch64-pc-windows-msvc/msvc (Release)	6m 22s
x86_64-apple-darwin/clang (Debug)	12m 49s
x86_64-apple-darwin/clang (Release)	8m 39s
aarch64-apple-darwin/clang (Debug)	9m 46s
aarch64-apple-darwin/clang (Release)	9m 36s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 9s
x86_64-unknown-linux-gnu/gcc (Release)	6m 0s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 37s
aarch64-unknown-linux-gnu/gcc (Release)	6m 3s
	2h 29m 15s

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