JIT

gh-143732: allow dict subclasses to be specialized #6364

Job	Run time
Interpreter (Debug)	4m 27s
aarch64-unknown-linux-gnu/gcc (Debug)	4m 27s
x86_64-unknown-linux-gnu/gcc (Release)	3m 37s
aarch64-apple-darwin/clang (Debug)	4m 32s
JIT without optimizations (Debug)	4m 5s
x86_64-apple-darwin/clang (Debug)	4m 27s
aarch64-pc-windows-msvc/msvc (Debug)	4m 20s
JIT with tail calling interpreter	4m 26s
aarch64-unknown-linux-gnu/gcc (Release)	3m 51s
Free-Threaded (Debug)	3m 36s
aarch64-apple-darwin/clang (Release)	3m 47s
x86_64-pc-windows-msvc/msvc (Debug)	4m 17s
x86_64-unknown-linux-gnu/gcc (Debug)	3m 42s
x86_64-apple-darwin/clang (Release)	4m 30s
aarch64-pc-windows-msvc/msvc (Release)	3m 43s
i686-pc-windows-msvc/msvc (Release)	4m 20s
i686-pc-windows-msvc/msvc (Debug)	4m 16s
x86_64-pc-windows-msvc/msvc (Release)	4m 20s
	1h 14m 43s

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