update prometheusrules for k8s v1.16

Created by: huanggze

Metrics changes: container_name > container pod_name > pod

https://github.com/kubernetes/kubernetes/blob/2808d7154dc820c2718d92eb2f000ffc5840b5d1/CHANGELOG-1.16.md#action-required

Signed-off-by: huanggze loganhuang@yunify.com