The Array() constructor is not spec compliant

[Razican]

Describe the bug
The Array() constructor is not spec compliant. When creating a huge array, for example:

let a = new Array(50000);

This will try to actually insert 50k properties in the array. The spec says otherwise. It should only set the length, and should not create any other property.

This happens because our implementation is not spec compliant. We should have 3 private constructor methods (construct_array, construct_array_length and construct_array_items), and they should be called from the constructor method. In each of them, we should have information about the exact spec, and use the actual spec implementation.

This means we will need to create an array_create function, that will follow this spec.

A similar thing should be done with the rest of the Array prototype methods.

[georgeroman]

I can take this one.

[Razican]

I can take this one.

Go ahead! :D let us know if you need guidance