[clang] Enable -Wunique-object-duplication inside templated code (PR #125902)

[Devon Loehr via cfe-commits]

================
@@ -3669,6 +3669,7 @@ class Sema final : public SemaBase {
   /// cause problems if the variable is mutable, its initialization is
   /// effectful, or its address is taken.
   bool GloballyUniqueObjectMightBeAccidentallyDuplicated(const VarDecl *Dcl);
+  void DiagnoseDangerousUniqueObjectDuplication(const VarDecl *Dcl);
----------------
DKLoehr wrote:

Not sure I agree, but not too important so changed it.

https://github.com/llvm/llvm-project/pull/125902