JIT

GH-128685: Specialize (rather than quicken) LOAD_CONST into LOAD_CONST_[IM]MORTAL #2446

Job	Run time
Interpreter (Debug)	7m 56s
Free-Threaded (Debug) (19)	12m 38s
i686-pc-windows-msvc/msvc (Debug)	18m 16s
i686-pc-windows-msvc/msvc (Release)	11m 12s
x86_64-pc-windows-msvc/msvc (Debug)	18m 13s
x86_64-pc-windows-msvc/msvc (Release)	12m 37s
aarch64-pc-windows-msvc/msvc (Debug)	4m 57s
aarch64-pc-windows-msvc/msvc (Release)	6m 32s
x86_64-apple-darwin/clang (Debug)	12m 48s
x86_64-apple-darwin/clang (Release)	8m 28s
aarch64-apple-darwin/clang (Debug)	10m 27s
aarch64-apple-darwin/clang (Release)	9m 29s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 52s
x86_64-unknown-linux-gnu/gcc (Release)	5m 54s
aarch64-unknown-linux-gnu/gcc (Debug)	5m 37s
aarch64-unknown-linux-gnu/gcc (Release)	6m 0s
	2h 39m 56s

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