[Bug libstdc++/121476] std::clamp is marked nodiscard, but std::ranges::clamp is not

[tkaminsk at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121476

--- Comment #1 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
I see this is not case limited to clamp, as all_of, none_of and most of the
search algorithms are in similar boat. We should most like update them all at
once.