JIT

gh-138497: Support LLVM_VERSION configuration via env #4099

Job	Run time
Interpreter (Debug)	9m 52s
Free-Threaded (Debug) (19)	17m 51s
JIT without optimizations (Debug) (19)	11m 22s
aarch64-pc-windows-msvc/msvc (Debug)	23m 33s
aarch64-apple-darwin/clang (Debug)	11m 42s
aarch64-pc-windows-msvc/msvc (Release)	20m 53s
x86_64-apple-darwin/clang (Release)	14m 21s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 28s
i686-pc-windows-msvc/msvc (Debug)	24m 16s
aarch64-apple-darwin/clang (Release)	10m 3s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 3s
x86_64-pc-windows-msvc/msvc (Debug)	23m 42s
x86_64-apple-darwin/clang (Debug)	23m 47s
aarch64-unknown-linux-gnu/gcc (Release)	5m 44s
x86_64-unknown-linux-gnu/gcc (Release)	9m 25s
i686-pc-windows-msvc/msvc (Release)	13m 24s
x86_64-pc-windows-msvc/msvc (Release)	14m 32s
	4h 14m 58s

Provide feedback