Posture check: OCI Kubernetes Engine Cluster endpoint is not configured with Network Security Groups
Query: ```config from cloud.resource where cloud.type = 'oci' AND api.name = 'oci-containers-artifacts-kubernetes-cluster' AND json.rule = lifecycleState equal ignore case ACTIVE and endpointConfig exists and (endpointConfig.nsgIds does not exist or endpointConfig.nsgIds equal ignore case "null" or endpointConfig.nsgIds is empty)```