[clang] [clangl[TableGen] Change Diagnostic Emitter to use const RecordKeeper (PR #108209)

[Rahul Joshi via cfe-commits]

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@@ -255,20 +257,18 @@ class InferPedantic {
       GMap;
 
   DiagGroupParentMap &DiagGroupParents;
-  const std::vector<Record*> &Diags;
-  const std::vector<Record*> DiagGroups;
+  ArrayRef<const Record *> Diags;
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jurahul wrote:

Let me know if that answers your question. This PR will unblock some other PR's of similar nature that depend on this one.

https://github.com/llvm/llvm-project/pull/108209