*: cleanup and unify minikube and self-hosted discovery

assets/prometheus/prometheus.yaml

hack/cluster-monitoring/deploy

hack/cluster-monitoring/teardown

manifests/etcd/etcd-bootkube-gce.yaml

manifests/etcd/etcd-bootkube-vagrant-multi.yaml

manifests/k8s/minikube/kube-apiserver.yaml

manifests/k8s/minikube/kube-controller-manager.yaml

manifests/k8s/minikube/kube-scheduler.yaml

manifests/k8s/self-hosted/kube-apiserver.yaml

manifests/k8s/self-hosted/kube-controller-manager.yaml

manifests/k8s/self-hosted/kube-dns.yaml

manifests/k8s/self-hosted/kube-scheduler.yaml

manifests/prometheus-operator.yaml

manifests/prometheus/prometheus-k8s-cm.yaml