JIT

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. #6156

Job	Run time
x86_64-apple-darwin/clang (Release)	25m 18s
aarch64-pc-windows-msvc/msvc (Debug)	28m 35s
aarch64-apple-darwin/clang (Release)	13m 59s
JIT without optimizations (Debug)	3m 26s
x86_64-unknown-linux-gnu/gcc (Release)	8m 58s
Free-Threaded (Debug)	3m 58s
JIT with tail calling interpreter	4m 45s
x86_64-pc-windows-msvc/msvc (Debug)	31m 6s
aarch64-unknown-linux-gnu/gcc (Release)	6m 47s
i686-pc-windows-msvc/msvc (Release)	14m 52s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 14s
i686-pc-windows-msvc/msvc (Debug)	25m 13s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 13s
aarch64-pc-windows-msvc/msvc (Release)	18m 20s
Interpreter (Debug)	12m 42s
aarch64-apple-darwin/clang (Debug)	16m 9s
x86_64-pc-windows-msvc/msvc (Release)	15m 35s
x86_64-apple-darwin/clang (Debug)	1m 29s
	4h 14m 39s

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