Fake clientset methods doesn't work properly

[ShreyanshMehta]

Methods like List() and UpdateStatus() from fake clientset doesn't work properly. As Create() method from fake clientset does not add kcp.io/cluster annotation to the object (which is expected) which is later being used by List() and UpdateStatus() to filter the objects.

Ideally, these method shouldn't depend on the annotation to filter the objects.
For example, List() uses the filterByCluster() to filter the object which internally uses the given annotation.