JIT

gh-115999: Specialize `LOAD_ATTR` for instance and class receivers in… #2506

Job	Run time
Interpreter (Debug)	7m 57s
Free-Threaded (Debug) (19)	12m 13s
i686-pc-windows-msvc/msvc (Debug)	17m 54s
i686-pc-windows-msvc/msvc (Release)	10m 50s
x86_64-pc-windows-msvc/msvc (Debug)	18m 38s
x86_64-pc-windows-msvc/msvc (Release)	11m 23s
aarch64-pc-windows-msvc/msvc (Debug)	4m 2s
aarch64-pc-windows-msvc/msvc (Release)	6m 26s
x86_64-apple-darwin/clang (Debug)	11m 11s
x86_64-apple-darwin/clang (Release)	8m 38s
aarch64-apple-darwin/clang (Debug)	11m 0s
aarch64-apple-darwin/clang (Release)	8m 59s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 52s
x86_64-unknown-linux-gnu/gcc (Release)	5m 38s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 46s
aarch64-unknown-linux-gnu/gcc (Release)	5m 53s
	2h 37m 20s

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