[clang] [Clang] [NFC] Refactor more AST visitors (PR #116823)

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@@ -266,7 +265,7 @@ class RenameLocFinder : public RecursiveASTVisitor<RenameLocFinder> {
     return true;
   }
 
-  bool VisitDeclRefExpr(const DeclRefExpr *Expr) {
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cor3ntin wrote:

Why are we removing const here (and other places)?

https://github.com/llvm/llvm-project/pull/116823