JIT

gh-143732: allow dict subclasses to be specialized #6438

Job	Run time
Free-Threaded (Debug)	3m 58s
JIT with tail calling interpreter	4m 41s
Interpreter (Debug)	12m 57s
JIT without optimizations (Debug)	3m 52s
aarch64-apple-darwin/clang (Release)	11m 55s
x86_64-unknown-linux-gnu/gcc (Debug)	15m 53s
aarch64-apple-darwin/clang (Debug)	12m 49s
x86_64-apple-darwin/clang (Release)	30m 49s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 55s
x86_64-unknown-linux-gnu/gcc (Release)	8m 30s
x86_64-apple-darwin/clang (Debug)	36m 55s
aarch64-pc-windows-msvc/msvc (Release)	18m 29s
i686-pc-windows-msvc/msvc (Debug)	25m 46s
x86_64-pc-windows-msvc/msvc (Release)	16m 12s
aarch64-unknown-linux-gnu/gcc (Release)	6m 24s
i686-pc-windows-msvc/msvc (Release)	15m 26s
aarch64-pc-windows-msvc/msvc (Debug)	24m 31s
x86_64-pc-windows-msvc/msvc (Debug)	29m 32s
	4h 47m 34s

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