Promote kops 1.19.0-alpha.4 images
Promote kops 1.19.0-alpha.4 images

kubernetes/k8s.io,thockin/k8s.io,kubernetes/k8s.io,thockin/k8s.io,thockin/k8s.io,thockin/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io