Automatic merge from submit-queue (batch tested with PRs 48106, 46761)

s/count/total/ in audit prometheus metrics

Responding to https://github.com/kubernetes/kubernetes/pull/46732#discussion_r124057806, making the metric names conform with the [metric naming convention](https://prometheus.io/docs/practices/naming/#metric-names).

kubernetes/features#22

/cc @ericchiang @ihmccreery