JIT

gh-149965: Improve thread-safety in ElementObjects within `element_ass_subscr` #6733

Job	Run time
JIT with tail calling interpreter	5m 14s
Interpreter (Debug)	14m 6s
x86_64-unknown-linux-gnu/gcc (Debug)	15m 50s
aarch64-pc-windows-msvc/msvc (Debug)	25m 16s
i686-pc-windows-msvc/msvc (Debug)	15m 59s
Free-Threaded (Debug)	4m 7s
x86_64-apple-darwin/clang (Debug)	33m 53s
aarch64-apple-darwin/clang (Debug)	18m 14s
aarch64-pc-windows-msvc/msvc (Release)	20m 5s
aarch64-unknown-linux-gnu/gcc (Release)	7m 20s
x86_64-apple-darwin/clang (Release)	1h 0m 18s
aarch64-apple-darwin/clang (Release)	14m 39s
JIT without optimizations (Debug)	4m 38s
i686-pc-windows-msvc/msvc (Release)	13m 49s
x86_64-unknown-linux-gnu/gcc (Release)	9m 32s
x86_64-pc-windows-msvc/msvc (Debug)	29m 46s
aarch64-unknown-linux-gnu/gcc (Debug)	9m 46s
x86_64-pc-windows-msvc/msvc (Release)	17m 6s
	5h 19m 38s

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