JIT

gh-142908: Don't use `DK_IS_UNICODE` in interpreter #4700

Job	Run time
Interpreter (Debug)	10m 57s
JIT with tail calling interpreter (21)	4m 8s
JIT without optimizations (Debug) (21)	12m 24s
Free-Threaded (Debug) (21)	16m 42s
aarch64-pc-windows-msvc/msvc (Debug)	23m 42s
x86_64-apple-darwin/clang (Release)	21m 33s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 24s
i686-pc-windows-msvc/msvc (Release)	13m 6s
x86_64-apple-darwin/clang (Debug)	24m 12s
aarch64-apple-darwin/clang (Debug)	13m 52s
aarch64-apple-darwin/clang (Release)	10m 14s
aarch64-pc-windows-msvc/msvc (Release)	19m 17s
i686-pc-windows-msvc/msvc (Debug)	24m 49s
x86_64-pc-windows-msvc/msvc (Debug)	24m 25s
aarch64-unknown-linux-gnu/gcc (Release)	6m 45s
x86_64-pc-windows-msvc/msvc (Release)	13m 11s
x86_64-unknown-linux-gnu/gcc (Release)	8m 30s
x86_64-unknown-linux-gnu/gcc (Debug)	12m 9s
	4h 28m 20s

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