[clang] [HLSL] Add a warning for implicit bindings (PR #135909)

[Justin Bogner via cfe-commits]

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@@ -3278,6 +3284,9 @@ void SemaHLSL::processExplicitBindingsOnDecl(VarDecl *VD) {
           << static_cast<int>(RT);
     }
   }
+
+  if (!HasBinding && VD->getType()->isHLSLResourceRecord())
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bogner wrote:

Good catch! Added some tests with arrays and updated this to use `isResourceRecordTypeOrArrayOf`

Note: I pulled in the overload of this function from #135120 to simplify things slightly and avoid churn later.

https://github.com/llvm/llvm-project/pull/135909