Werk #10859: agent_prometheus: addition of kube-state-metrics compatibility

This change introduces the kube-state-metrics package into the Prometheus agent. It allows to monitor the connected Kubernetes cluster and associating entities through the Prometheus connection. This monitoring option along with selection of the entity levels can be configured in the Prometheus Datasource Programs ruleset. The queried information uses the same k8 check-plugins as the native Kubernetes agent. Information about the cluster, nodes, pods, daemon sets and services can be retrieved through this option.

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