Add all grafana dashboards into grafana formula

Change-Id: Iced67bc96c579883607bd446342132c0873148d7
PROD-Related: PROD-22139
diff --git a/metadata/service/client/dashboards/stacklight/alertmanager.yml b/metadata/service/client/dashboards/stacklight/alertmanager.yml
new file mode 100644
index 0000000..6edea24
--- /dev/null
+++ b/metadata/service/client/dashboards/stacklight/alertmanager.yml
@@ -0,0 +1,8 @@
+parameters:
+  grafana:
+    client:
+      dashboard:
+        alertmanager_prometheus:
+          datasource: prometheus
+          format: json
+          template: grafana/files/dashboards/prometheus/alertmanager_prometheus.json