JIT

gh-131798: Narrow the return type of `_FORMAT_SIMPLE` and `_FORMAT_WITH_SPEC` to `str` #5827

Job	Run time
Interpreter (Debug)	12m 10s
aarch64-apple-darwin/clang (Release)	12m 11s
JIT with tail calling interpreter	4m 41s
aarch64-apple-darwin/clang (Debug)	15m 39s
x86_64-apple-darwin/clang (Debug)	35m 8s
aarch64-pc-windows-msvc/msvc (Debug)	26m 50s
i686-pc-windows-msvc/msvc (Debug)	27m 3s
x86_64-pc-windows-msvc/msvc (Debug)	29m 34s
i686-pc-windows-msvc/msvc (Release)	15m 11s
x86_64-unknown-linux-gnu/gcc (Release)	8m 45s
aarch64-unknown-linux-gnu/gcc (Release)	6m 58s
aarch64-pc-windows-msvc/msvc (Release)	19m 36s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 47s
x86_64-pc-windows-msvc/msvc (Release)	15m 39s
x86_64-apple-darwin/clang (Release)	28m 50s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 51s
Free-Threaded (Debug)	3m 52s
JIT without optimizations (Debug)	3m 43s
	4h 48m 28s

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