assets: modify and add grafana dashboards

assets/grafana/all-nodes-dashboard.json

assets/grafana/deployment-dashboard.json

assets/grafana/kubernetes-capacity-planing-dashboard.json

assets/grafana/kubernetes-cluster-health-dashboard.json

assets/grafana/kubernetes-cluster-status-dashboard.json

...ts/grafana/kubernetes-control-plane-status-dashboard.json

assets/grafana/kubernetes-pods-dashboard.json

assets/grafana/kubernetes-resource-requests-dashboard.json

assets/grafana/node-dashboard.json

assets/grafana/nodes-dashboard.json

assets/grafana/pods-dashboard.json

assets/grafana/resource-requests-dashboard.json

assets/prometheus/rules/node.rules

manifests/grafana/grafana-dashboards.yaml

manifests/prometheus/prometheus-k8s-rules.yaml