JIT

gh-138451: Support custom LLVM installation path #6245

Job	Run time
Interpreter (Debug)	11m 37s
JIT with tail calling interpreter	4m 29s
x86_64-apple-darwin/clang (Debug)	30m 57s
aarch64-apple-darwin/clang (Release)	13m 5s
JIT without optimizations (Debug)	4m 3s
Free-Threaded (Debug)	3m 57s
x86_64-apple-darwin/clang (Release)	31m 17s
aarch64-unknown-linux-gnu/gcc (Release)	6m 54s
x86_64-unknown-linux-gnu/gcc (Debug)	15m 31s
x86_64-unknown-linux-gnu/gcc (Release)	9m 34s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 22s
aarch64-pc-windows-msvc/msvc (Release)	19m 11s
x86_64-pc-windows-msvc/msvc (Release)	16m 11s
aarch64-apple-darwin/clang (Debug)	13m 7s
x86_64-pc-windows-msvc/msvc (Debug)	29m 31s
aarch64-pc-windows-msvc/msvc (Debug)	28m 4s
i686-pc-windows-msvc/msvc (Debug)	22m 22s
i686-pc-windows-msvc/msvc (Release)	16m 14s
	4h 45m 26s

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