JIT

gh-145742: Manually emit _LOAD_FAST_BORROW to reduce stencil bloat #6089

Job	Run time
Interpreter (Debug)	12m 26s
JIT with tail calling interpreter	4m 14s
Free-Threaded (Debug)	3m 41s
aarch64-apple-darwin/clang (Debug)	15m 40s
JIT without optimizations (Debug)	3m 39s
aarch64-unknown-linux-gnu/gcc (Release)	6m 44s
x86_64-unknown-linux-gnu/gcc (Release)	8m 50s
aarch64-apple-darwin/clang (Release)	12m 43s
x86_64-unknown-linux-gnu/gcc (Debug)	12m 44s
x86_64-apple-darwin/clang (Debug)	34m 40s
i686-pc-windows-msvc/msvc (Release)	13m 58s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 9s
x86_64-apple-darwin/clang (Release)	34m 38s
aarch64-pc-windows-msvc/msvc (Debug)	25m 29s
x86_64-pc-windows-msvc/msvc (Debug)	29m 47s
x86_64-pc-windows-msvc/msvc (Release)	15m 17s
i686-pc-windows-msvc/msvc (Debug)	20m 51s
aarch64-pc-windows-msvc/msvc (Release)	18m 5s
	4h 42m 35s

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