Rollup merge of #88123 - camelid:tup-pat-precise-spans, r=estebank

Make spans for tuple patterns in E0023 more precise

As suggested in #86307. Closes #86307.

r? ````@estebank````

compiler/rustc_ty_utils/src/ty.rs

@@ -223,7 +223,18 @@ fn associated_items(tcx: TyCtxt<'_>, def_id: DefId) -> ty::AssocItems<'_> {
 }
 
 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)
+    tcx.hir()
+        .get_if_local(def_id)
+        .and_then(|node| match node {
+            // A `Ctor` doesn't have an identifier itself, but its parent
+            // struct/variant does. Compare with `hir::Map::opt_span`.
+            hir::Node::Ctor(ctor) => ctor
+                .ctor_hir_id()
+                .and_then(|ctor_id| tcx.hir().find(tcx.hir().get_parent_node(ctor_id)))
+                .and_then(|parent| parent.ident()),
+            _ => node.ident(),
+        })
+        .map(|ident| ident.span)
 }
 
 /// If the given `DefId` describes an item belonging to a trait,