JIT

gh-138497: Support LLVM_VERSION configuration via env #3972

Job	Run time
Interpreter (Debug)	9m 54s
aarch64-unknown-linux-gnu/gcc (Release)	7m 29s
aarch64-apple-darwin/clang (Debug)	12m 27s
aarch64-pc-windows-msvc/msvc (Release)	16m 31s
i686-pc-windows-msvc/msvc (Release)	10m 39s
x86_64-apple-darwin/clang (Release)	18m 46s
aarch64-apple-darwin/clang (Release)	11m 4s
x86_64-apple-darwin/clang (Debug)	21m 44s
aarch64-pc-windows-msvc/msvc (Debug)	22m 54s
x86_64-pc-windows-msvc/msvc (Debug)	19m 46s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 16s
i686-pc-windows-msvc/msvc (Debug)	21m 37s
x86_64-unknown-linux-gnu/gcc (Release)	8m 13s
x86_64-pc-windows-msvc/msvc (Release)	11m 36s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 53s
	3h 30m 49s

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