JIT

gh-153569: Add tokenizer source and cursor primitives #6989

Job	Run time
JIT without optimizations (Debug)	4m 13s
JIT with tail calling interpreter	5m 9s
x86_64-apple-darwin/clang (Debug)	33m 58s
x86_64-apple-darwin/clang (Release)	28m 14s
i686-pc-windows-msvc/msvc (Release)	15m 33s
aarch64-apple-darwin/clang (Release)	14m 38s
i686-pc-windows-msvc/msvc (Debug)	25m 26s
aarch64-pc-windows-msvc/msvc (Release)	18m 14s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 52s
aarch64-apple-darwin/clang (Debug)	14m 20s
Free-Threaded (Debug)	4m 28s
x86_64-unknown-linux-gnu/gcc (Debug)	16m 3s
x86_64-pc-windows-msvc/msvc (Debug)	23m 38s
aarch64-pc-windows-msvc/msvc (Debug)	24m 56s
x86_64-unknown-linux-gnu/gcc (Release)	9m 45s
aarch64-unknown-linux-gnu/gcc (Release)	6m 43s
JIT with stress testing (Debug)	4m 5s
x86_64-pc-windows-msvc/msvc (Release)	17m 7s
Interpreter (Debug)	14m 25s
	4h 49m 47s

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