gh-145779: Improve classmethod/staticmethod scaling in free-threaded … #2231

Job	Run time
x86_64-unknown-linux-gnu/gcc	9m 43s
x86_64-pc-windows-msvc/msvc-free-threading	5m 3s
x86_64-pc-windows-msvc/msvc	9m 52s
x86_64-unknown-linux-gnu/gcc-free-threading	8m 23s
aarch64-apple-darwin/clang	9m 30s
x86_64-apple-darwin/clang	15m 11s
aarch64-unknown-linux-gnu/gcc	7m 16s
	1h 4m 58s

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