CircularQueue: Correctly pass args to enqueue

Problem:
- Using regular functions rather than function templates results in
  the arguments not being deduced. This then requires the same
  function to be written multiple times and for `move` to be used
  rather than `forward`.

Solution:
- Collapse multiple function overloads to a single function template
  with a deduced argument. This allows the argument to be a forwarding
  reference and bind to either an l-value or r-value and forward the
  value.

AK/CircularQueue.h

@@ -60,24 +60,20 @@ public:
 
     size_t capacity() const { return Capacity; }
 
-    void enqueue(T&& value)
+    template<typename U = T>
+    void enqueue(U&& value)
     {
         auto& slot = elements()[(m_head + m_size) % Capacity];
         if (m_size == Capacity)
             slot.~T();
 
-        new (&slot) T(move(value));
+        new (&slot) T(forward<U>(value));
         if (m_size == Capacity)
             m_head = (m_head + 1) % Capacity;
         else
             ++m_size;
     }
 
-    void enqueue(const T& value)
-    {
-        enqueue(T(value));
-    }
-
     T dequeue()
     {
         ASSERT(!is_empty());