JIT

gh-138451: Support custom LLVM installation path #4410

Job	Run time
Interpreter (Debug)	10m 11s
JIT without optimizations (Debug) (21)	11m 10s
JIT with tail calling interpreter (21)	3m 17s
Free-Threaded (Debug) (21)	16m 11s
i686-pc-windows-msvc/msvc (Debug)	22m 27s
aarch64-pc-windows-msvc/msvc (Debug)	24m 5s
aarch64-pc-windows-msvc/msvc (Release)	19m 4s
i686-pc-windows-msvc/msvc (Release)	12m 20s
aarch64-apple-darwin/clang (Debug)	11m 12s
x86_64-apple-darwin/clang (Debug)	41m 47s
x86_64-apple-darwin/clang (Release)	24m 35s
x86_64-pc-windows-msvc/msvc (Debug)	20m 52s
x86_64-unknown-linux-gnu/gcc (Debug)	11m 52s
x86_64-unknown-linux-gnu/gcc (Release)	7m 13s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 37s
x86_64-pc-windows-msvc/msvc (Release)	11m 29s
aarch64-apple-darwin/clang (Release)	9m 47s
aarch64-unknown-linux-gnu/gcc (Release)	7m 4s
	4h 32m 13s

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