JIT

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. #5805

Job	Run time
JIT with tail calling interpreter	4m 14s
Free-Threaded (Debug)	3m 46s
x86_64-unknown-linux-gnu/gcc (Release)	8m 49s
aarch64-apple-darwin/clang (Release)	12m 14s
Interpreter (Debug)	12m 34s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 11s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 58s
aarch64-apple-darwin/clang (Debug)	16m 12s
x86_64-pc-windows-msvc/msvc (Debug)	28m 37s
aarch64-unknown-linux-gnu/gcc (Release)	6m 49s
x86_64-apple-darwin/clang (Release)	27m 6s
JIT without optimizations (Debug)	3m 52s
aarch64-pc-windows-msvc/msvc (Release)	18m 45s
x86_64-pc-windows-msvc/msvc (Release)	15m 45s
x86_64-apple-darwin/clang (Debug)	45m 54s
i686-pc-windows-msvc/msvc (Debug)	21m 5s
aarch64-pc-windows-msvc/msvc (Debug)	26m 40s
i686-pc-windows-msvc/msvc (Release)	15m 5s
	4h 50m 36s

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