JIT

gh-138451: Support custom LLVM installation path #4225

Job	Run time
Interpreter (Debug)	9m 54s
Free-Threaded (Debug) (19)	16m 31s
aarch64-pc-windows-msvc/msvc (Release)	18m 44s
x86_64-pc-windows-msvc/msvc (Debug)	25m 2s
aarch64-pc-windows-msvc/msvc (Debug)	25m 26s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 58s
i686-pc-windows-msvc/msvc (Debug)	26m 4s
x86_64-pc-windows-msvc/msvc (Release)	14m 26s
aarch64-unknown-linux-gnu/gcc (Release)	6m 45s
x86_64-unknown-linux-gnu/gcc (Debug)	11m 1s
x86_64-apple-darwin/clang (Debug)	30m 59s
aarch64-apple-darwin/clang (Debug)	10m 41s
aarch64-apple-darwin/clang (Release)	12m 8s
i686-pc-windows-msvc/msvc (Release)	13m 55s
JIT without optimizations (Debug) (19)	10m 56s
x86_64-unknown-linux-gnu/gcc (Release)	6m 50s
x86_64-apple-darwin/clang (Release)	21m 37s
	4h 28m 57s

Provide feedback