Auto merge of #77524 - Patryk27:fixes/66228, r=estebank

Rework diagnostics for wrong number of generic args (fixes #66228 and #71924)

This PR reworks the `wrong number of {} arguments` message, so that it provides more details and contextual hints.

compiler/rustc_ty_utils/src/ty.rs

@@ -222,6 +222,10 @@ fn def_span(tcx: TyCtxt<'_>, def_id: DefId) -> Span {
     tcx.hir().span_if_local(def_id).unwrap()
 }
 
+fn def_ident_span(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Span> {
+    tcx.hir().get_if_local(def_id).and_then(|node| node.ident()).map(|ident| ident.span)
+}
+
 /// If the given `DefId` describes an item belonging to a trait,
 /// returns the `DefId` of the trait that the trait item belongs to;
 /// otherwise, returns `None`.
@@ -492,6 +496,7 @@ pub fn provide(providers: &mut ty::query::Providers) {
         associated_items,
         adt_sized_constraint,
         def_span,
+        def_ident_span,
         param_env,
         param_env_reveal_all_normalized,
         trait_of_item,