Posture check: GCP Kubernetes Engine Clusters not configured with network traffic egress metering
Query: ```config from cloud.resource where cloud.type = 'gcp' AND api.name = 'gcloud-container-describe-clusters' AND json.rule =  'resourceUsageExportConfig.enableNetworkEgressMetering does not exist or resourceUsageExportConfig.enableNetworkEgressMetering is false'```