gh-145779: Improve classmethod/staticmethod scaling in free-threaded … #2409

Job	Run time
x86_64-pc-windows-msvc/msvc	11m 52s
x86_64-pc-windows-msvc/msvc-free-threading	6m 23s
x86_64-unknown-linux-gnu/gcc	10m 11s
x86_64-unknown-linux-gnu/gcc-free-threading	10m 15s
x86_64-apple-darwin/clang	16m 6s
aarch64-unknown-linux-gnu/gcc	7m 18s
aarch64-apple-darwin/clang	9m 48s
	1h 11m 53s

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