[clang] Initial implementation of P2719 (PR #113510)

[Erich Keane via cfe-commits]

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@@ -2474,19 +2474,46 @@ bool CXXMethodDecl::isUsualDeallocationFunction(
       getOverloadedOperator() != OO_Array_Delete)
     return false;
 
+  auto NumParams = getNumParams();
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erichkeane wrote:

Don't use auto here, only when the type is on the RHS per coding standard.

https://github.com/llvm/llvm-project/pull/113510