add cilium hubble-ui enable flag (#10939)

inventory/sample/group_vars/k8s_cluster/k8s-net-cilium.yml

roles/network_plugin/cilium/defaults/main.yml

roles/network_plugin/cilium/templates/hubble/cr.yml.j2

roles/network_plugin/cilium/templates/hubble/crb.yml.j2

roles/network_plugin/cilium/templates/hubble/deploy.yml.j2

roles/network_plugin/cilium/templates/hubble/sa.yml.j2

roles/network_plugin/cilium/templates/hubble/service.yml.j2