LibJS: Consistently make prototype the last argument in Object ctors

This is so that we can reliably allocate them in a template function,
e.g. in ordinary_create_from_constructor():

    global_object.heap().allocate<T>(
        global_object, forward<Args>(args)..., *prototype);

The majority of objects already take the prototype as the last argument,
so I updated the ones that didn't.

Userland/Libraries/LibJS/Runtime/ArrayIterator.h

@@ -16,7 +16,7 @@ class ArrayIterator final : public Object {
 public:
     static ArrayIterator* create(GlobalObject&, Value array, Object::PropertyKind iteration_kind);
 
-    explicit ArrayIterator(Object& prototype, Value array, Object::PropertyKind iteration_kind);
+    explicit ArrayIterator(Value array, Object::PropertyKind iteration_kind, Object& prototype);
     virtual ~ArrayIterator() override;
 
     Value array() const { return m_array; }