JIT

gh-115999: Add free-threaded specialization for FOR_ITER #2587

Job	Run time
Interpreter (Debug)	7m 33s
Free-Threaded (Debug) (19)	1m 34s
i686-pc-windows-msvc/msvc (Debug)	18m 0s
i686-pc-windows-msvc/msvc (Release)	11m 55s
x86_64-pc-windows-msvc/msvc (Debug)	17m 54s
x86_64-pc-windows-msvc/msvc (Release)	11m 46s
aarch64-pc-windows-msvc/msvc (Debug)	4m 44s
aarch64-pc-windows-msvc/msvc (Release)	6m 37s
x86_64-apple-darwin/clang (Debug)	13m 32s
x86_64-apple-darwin/clang (Release)	11m 16s
aarch64-apple-darwin/clang (Debug)	10m 39s
aarch64-apple-darwin/clang (Release)	10m 10s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 1s
x86_64-unknown-linux-gnu/gcc (Release)	7m 11s
aarch64-unknown-linux-gnu/gcc (Debug)	5m 52s
aarch64-unknown-linux-gnu/gcc (Release)	5m 25s
	2h 33m 9s

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