JIT

gh-115999: Add free-threaded specialization for FOR_ITER #2589

Job	Run time
Interpreter (Debug)	7m 30s
Free-Threaded (Debug) (19)	1m 36s
i686-pc-windows-msvc/msvc (Debug)	18m 48s
i686-pc-windows-msvc/msvc (Release)	11m 39s
x86_64-pc-windows-msvc/msvc (Debug)	19m 19s
x86_64-pc-windows-msvc/msvc (Release)	11m 19s
aarch64-pc-windows-msvc/msvc (Debug)	5m 1s
aarch64-pc-windows-msvc/msvc (Release)	6m 38s
x86_64-apple-darwin/clang (Debug)	10m 37s
x86_64-apple-darwin/clang (Release)	11m 24s
aarch64-apple-darwin/clang (Debug)	9m 22s
aarch64-apple-darwin/clang (Release)	8m 20s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 52s
x86_64-unknown-linux-gnu/gcc (Release)	5m 41s
aarch64-unknown-linux-gnu/gcc (Debug)	5m 38s
aarch64-unknown-linux-gnu/gcc (Release)	4m 57s
	2h 26m 41s

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