[libc++][NFC] Mark P1869R1 as implemented (#107746)
https://wg21.link/p1869r1: Rename `condition_variable_any` interruptible
wait methods
The paper was implemented as experimental feature in Clang 18 in:
https://github.com/llvm/llvm-project/commit/4fa812bb52a5b1eea22750a1b59f94221d0df622
Experimental status removed in:
https://github.com/llvm/llvm-project/pull/107900
Closes https://github.com/llvm/llvm-project/issues/100031
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Co-authored-by: Hristo Hristov <zingam@outlook.com>
