JIT

gh-131586: Avoid refcount contention in context managers #3259

Job	Run time
Interpreter (Debug)	9m 11s
Free-Threaded (Debug) (19)	13m 34s
i686-pc-windows-msvc/msvc (Debug)	20m 48s
i686-pc-windows-msvc/msvc (Release)	12m 48s
x86_64-pc-windows-msvc/msvc (Debug)	20m 9s
x86_64-pc-windows-msvc/msvc (Release)	10m 56s
aarch64-pc-windows-msvc/msvc (Debug)	23m 6s
aarch64-pc-windows-msvc/msvc (Release)	20m 36s
x86_64-apple-darwin/clang (Debug)	14m 36s
x86_64-apple-darwin/clang (Release)	12m 3s
aarch64-apple-darwin/clang (Debug)	8m 40s
aarch64-apple-darwin/clang (Release)	7m 47s
x86_64-unknown-linux-gnu/gcc (Debug)	11m 33s
x86_64-unknown-linux-gnu/gcc (Release)	6m 5s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 47s
aarch64-unknown-linux-gnu/gcc (Release)	6m 25s
	3h 26m 4s

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