gh-115999: Add free-threaded specialization for CONTAINS_OP #2084

Job	Run time
Interpreter (Debug)	7m 7s
Free-Threaded (Debug) (19)	10m 30s
i686-pc-windows-msvc/msvc (Debug)	18m 5s
i686-pc-windows-msvc/msvc (Release)	21m 35s
x86_64-pc-windows-msvc/msvc (Debug)	18m 15s
x86_64-pc-windows-msvc/msvc (Release)	21m 49s
aarch64-pc-windows-msvc/msvc (Debug)	5m 9s
aarch64-pc-windows-msvc/msvc (Release)	6m 11s
x86_64-apple-darwin/clang (Debug)	18m 30s
x86_64-apple-darwin/clang (Release)	27m 9s
x86_64-unknown-linux-gnu/gcc (Debug)	7m 55s
x86_64-unknown-linux-gnu/gcc (Release)	17m 19s
x86_64-unknown-linux-gnu/clang (Debug)	7m 51s
x86_64-unknown-linux-gnu/clang (Release)	13m 10s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 13m 7s
aarch64-unknown-linux-gnu/gcc (Release)	35m 41s
aarch64-unknown-linux-gnu/clang (Debug)	1h 8m 45s
aarch64-unknown-linux-gnu/clang (Release)	37m 57s
	6h 56m 5s

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