JIT

gh-138497: Support LLVM_VERSION configuration via env #4022

Job	Run time
Interpreter (Debug)	9m 48s
i686-pc-windows-msvc/msvc (Debug)	22m 48s
x86_64-pc-windows-msvc/msvc (Release)	12m 48s
i686-pc-windows-msvc/msvc (Release)	13m 14s
x86_64-apple-darwin/clang (Release)	15m 28s
aarch64-pc-windows-msvc/msvc (Release)	18m 10s
aarch64-apple-darwin/clang (Release)	10m 28s
x86_64-apple-darwin/clang (Debug)	18m 38s
aarch64-pc-windows-msvc/msvc (Debug)	23m 17s
aarch64-apple-darwin/clang (Debug)	13m 19s
x86_64-pc-windows-msvc/msvc (Debug)	21m 27s
x86_64-unknown-linux-gnu/gcc (Debug)	11m 55s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 1s
x86_64-unknown-linux-gnu/gcc (Release)	6m 47s
aarch64-unknown-linux-gnu/gcc (Release)	5m 37s
	3h 30m 45s

Provide feedback