Rename consuming chaining methods on DiagnosticBuilder.

In #119606 I added them and used a `_mv` suffix, but that wasn't great.

A `with_` prefix has three different existing uses.
- Constructors, e.g. `Vec::with_capacity`.
- Wrappers that provide an environment to execute some code, e.g.
  `with_session_globals`.
- Consuming chaining methods, e.g. `Span::with_{lo,hi,ctxt}`.

The third case is exactly what we want, so this commit changes
`DiagnosticBuilder::foo_mv` to `DiagnosticBuilder::with_foo`.

Thanks to @compiler-errors for the suggestion.

compiler/rustc_hir_analysis/src/check/dropck.rs

@@ -165,7 +165,7 @@ fn ensure_drop_predicates_are_implied_by_item_defn<'tcx>(
                         "`Drop` impl requires `{root_predicate}` \
                         but the {self_descr} it is implemented for does not",
                     )
-                    .span_note_mv(item_span, "the implementor must specify the same requirement")
+                    .with_span_note(item_span, "the implementor must specify the same requirement")
                     .emit(),
                 );
             }
@@ -197,7 +197,7 @@ fn ensure_drop_predicates_are_implied_by_item_defn<'tcx>(
                     "`Drop` impl requires `{outlives}` \
                     but the {self_descr} it is implemented for does not",
                 )
-                .span_note_mv(item_span, "the implementor must specify the same requirement")
+                .with_span_note(item_span, "the implementor must specify the same requirement")
                 .emit(),
             );
         }