Placement do not work with cross-workspaces

[mjudeikis]

Currently placements do not work with cross-workspaces. Need to investigate and fix

// TODO(MJ): currently this disables the cross workspace placements. This is due to
// fact indexers are build ontop of logicalcluster paths and we use here the 'readable' paths
// if len(placement.Spec.LocationWorkspace) > 0 {
//	locationWorkspace = logicalcluster.NewPath(placement.Spec.LocationWorkspace)
// } else {
locationWorkspace = logicalcluster.From(placement).Path()
// }