Always use the allocator to construct/destruct elements of a deque/vector. Fixes PR#28412. Thanks to Jonathan Wakely for the report.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@275105 91177308-0d34-0410-b5e6-96231b3b80d8

include/vector

@@ -1812,9 +1812,9 @@ vector<_Tp, _Allocator>::emplace(const_iterator __position, _Args&&... __args)
         }
         else
         {
-            value_type __tmp(_VSTD::forward<_Args>(__args)...);
+            __temp_value<value_type, _Allocator> __tmp(this->__alloc(), _VSTD::forward<_Args>(__args)...);
             __move_range(__p, this->__end_, __p + 1);
-            *__p = _VSTD::move(__tmp);
+            *__p = _VSTD::move(__tmp.get());
         }
         __annotator.__done();
     }