[clang-tools-extra] clangd: Make callHierarchy follow inheritance (PR #163024)

[Nathan Ridge via cfe-commits]

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@@ -379,6 +379,27 @@ void Dex::relations(
   }
 }
 
+void Dex::reverseRelations(
+    const RelationsRequest &Req,
+    llvm::function_ref<void(const SymbolID &, const Symbol &)> Callback) const {
+  assert(Req.Predicate == RelationKind::OverriddenBy);
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HighCommander4 wrote:

Please add a `trace::Span` declaration similar to the one in `relations()`

https://github.com/llvm/llvm-project/pull/163024