Hide obsolete CRD in OLM

[aliok]

As per OLM docs

apply the following annotation on the CSV to hide the obsolete CRD.

apiVersion: operators.coreos.com/v1alpha1
kind: ClusterServiceVersion
metadata:
  name: my-operator-v1.2.3
  annotations:
    operators.operatorframework.io/internal-objects: '["my.internal.crd1.io","my.internal.crd2.io"]' 
...

[aliok]

/assign @aliok