JIT

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. #5976

Job	Run time
Interpreter (Debug)	12m 11s
x86_64-apple-darwin/clang (Release)	22m 54s
aarch64-unknown-linux-gnu/gcc (Release)	7m 8s
x86_64-unknown-linux-gnu/gcc (Release)	9m 1s
aarch64-apple-darwin/clang (Release)	13m 20s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 28s
Free-Threaded (Debug)	3m 54s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 0s
x86_64-pc-windows-msvc/msvc (Debug)	25m 1s
JIT with tail calling interpreter	5m 0s
x86_64-apple-darwin/clang (Debug)	32m 50s
aarch64-apple-darwin/clang (Debug)	12m 29s
aarch64-pc-windows-msvc/msvc (Debug)	24m 48s
i686-pc-windows-msvc/msvc (Debug)	30m 26s
JIT without optimizations (Debug)	3m 30s
aarch64-pc-windows-msvc/msvc (Release)	17m 30s
i686-pc-windows-msvc/msvc (Release)	15m 10s
x86_64-pc-windows-msvc/msvc (Release)	16m 16s
	4h 34m 56s

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