[clang-tools-extra] Refactor clang doc comment structure (PR #142273)

[Erick Velez via cfe-commits]

================
@@ -65,6 +65,35 @@ template <> struct ScalarEnumerationTraits<InfoType> {
   }
 };
 
+template <>
+struct llvm::yaml::ScalarEnumerationTraits<clang::doc::CommentKind> {
----------------
evelez7 wrote:

This doesn't need the `llvm::yaml` qualification.

https://github.com/llvm/llvm-project/pull/142273