JIT

gh-134584: Eliminate redundant refcounting from _BINARY_OP_ADD_UNICODE #3720

Job	Run time
Interpreter (Debug)	9m 33s
i686-pc-windows-msvc/msvc (Release)	11m 44s
i686-pc-windows-msvc/msvc (Debug)	22m 10s
aarch64-pc-windows-msvc/msvc (Debug)	21m 30s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 43s
x86_64-apple-darwin/clang (Release)	9m 53s
x86_64-pc-windows-msvc/msvc (Release)	13m 47s
x86_64-pc-windows-msvc/msvc (Debug)	19m 43s
x86_64-apple-darwin/clang (Debug)	14m 11s
aarch64-apple-darwin/clang (Release)	9m 3s
aarch64-apple-darwin/clang (Debug)	10m 16s
x86_64-unknown-linux-gnu/gcc (Release)	6m 27s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 15s
aarch64-pc-windows-msvc/msvc (Release)	17m 59s
aarch64-unknown-linux-gnu/gcc (Release)	5m 43s
	3h 10m 57s

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