[clang] [clang] NFCI: improve TemplateArgument and TemplateName dump methods (PR #94905)

[Matheus Izvekov via cfe-commits]

================
@@ -360,3 +360,34 @@ LLVM_DUMP_METHOD void ConceptReference::dump(raw_ostream &OS) const {
   ASTDumper P(OS, Ctx, Ctx.getDiagnostics().getShowColors());
   P.Visit(this);
 }
+
+//===----------------------------------------------------------------------===//
+// TemplateName method implementations
+//===----------------------------------------------------------------------===//
+
+// FIXME: These are using the TemplateArgument dumper.
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mizvekov wrote:

Well you are going to hit dump on a TemplateName, and it's going to dump a TemplateArgument of template kind, which is misleading and incorrect, but still helpful in the narrow context this is a debugging aid not actually used in production.

https://github.com/llvm/llvm-project/pull/94905