[Bug libstdc++/93651] std::ranges::iota_view::iterator is not a Cpp17 input iterator

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93651

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 47812
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47812&action=edit
Make cpp17-input-iterator concept allow non-integral types.

This patch fixes the problem.