[12.x] Support Virtual Properties When Serializing Models

[beschoenen]

When serializing models using the SerializesModels trait that contain PHP 8.4's new property hooks. The serializing fails with the following error:

namespace MyNamespace;

class MyClass
{
  use SerializesModels;

  public string $property {
    get {
      return 'Foo';
    }
  }
}

Property MyNamespace\MyClass::$property is read-only

These new property that do not actually contain any value, are virtual and can be safely ignored during serialization.

I'm not a 100% sure on how to test this code since it's only applicable to PHP 8.4.