LibJS: Move native objects towards two-pass construction

To make sure that everything is set up correctly in objects before we
start adding properties to them, we split cell allocation into 3 steps:

1. Allocate a cell of appropriate size from the Heap
2. Call the C++ constructor on the cell
3. Call initialize() on the constructed object

The job of initialize() is to define all the initial properties.
Doing it in a second pass guarantees that the Object has a valid Shape
and can find its own GlobalObject.

Libraries/LibJS/Runtime/Array.cpp

@@ -36,7 +36,7 @@ namespace JS {
 Array* Array::create(GlobalObject& global_object)
 {
     auto& interpreter = global_object.interpreter();
-    return interpreter.heap().allocate<Array>(*global_object.array_prototype());
+    return interpreter.heap().allocate<Array>(global_object, *global_object.array_prototype());
 }
 
 Array::Array(Object& prototype)