Auto merge of #121268 - Urgau:improve_ambi_wide_ptr_cmps, r=Nadrieril

Add detection of [Partial]Ord methods in the `ambiguous_wide_pointer_comparisons` lint

Partially addresses rust-lang/rust#121264 by adding diagnostics items for PartialOrd and Ord methods, detecting such diagnostics items as "binary operation" and suggesting the correct replacement.

I also took the opportunity to change the suggestion to use new methods `.cast()` on `*mut T` an d `*const T`.

Author: bors