JIT

gh-149965: Improve thread-safety in ElementObjects within `element_ass_subscr` #6730

Job	Run time
Interpreter (Debug)	14m 20s
aarch64-unknown-linux-gnu/gcc (Release)	7m 13s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 26s
JIT with tail calling interpreter	4m 34s
x86_64-apple-darwin/clang (Release)	33m 20s
JIT without optimizations (Debug)	3m 56s
aarch64-pc-windows-msvc/msvc (Debug)	24m 34s
i686-pc-windows-msvc/msvc (Debug)	19m 1s
aarch64-apple-darwin/clang (Debug)	19m 52s
i686-pc-windows-msvc/msvc (Release)	16m 8s
x86_64-unknown-linux-gnu/gcc (Release)	9m 40s
x86_64-pc-windows-msvc/msvc (Release)	17m 29s
aarch64-pc-windows-msvc/msvc (Release)	19m 39s
aarch64-apple-darwin/clang (Release)	14m 37s
x86_64-unknown-linux-gnu/gcc (Debug)	15m 38s
Free-Threaded (Debug)	3m 52s
x86_64-apple-darwin/clang (Debug)	40m 30s
x86_64-pc-windows-msvc/msvc (Debug)	29m 11s
	5h 3m 0s

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