chore: update network alerts with useful information

Author: spypsy

spartan/metrics/grafana/alerts/contactpoints.yaml

@@ -7,5 +7,12 @@ contactPoints:
           type: slack
           settings:
             url: $SLACK_WEBHOOK_URL
-          disableResolveMessage: false
+            text: >-
+              *Alert:* {{ .CommonAnnotations.summary }}
 
+              *Grafana overview:* 
+              https://{{ with (first (query "kube_service_status_load_balancer_ingress{service=\"metrics-grafana\"}")) }}{{ if .Labels.ip }}{{ .Labels.ip }}{{ else }}{{ .Labels.hostname }}{{ end }}{{ end }}/d/aztec-network/network-overview?orgId=1&refresh=30s&var-data_source=default&var-namespace={{ urlquery (index .CommonLabels "k8s_namespace_name") }}
+
+              *GKE workloads:* 
+              https://console.cloud.google.com/kubernetes/workload/overview?project={{ index .CommonLabels "gcp_project" }}&supportedpurview=project
+          disableResolveMessage: false