fix(cnpg): Add scheduled backup to atlantis chart

To work update the bucket-name and add the `nutanix-s3`
secret to the namespace.

charts/atlantis/templates/schedule.yaml

@@ -0,0 +1,11 @@
+{{- if and .Values.cluster.backup.enabled .Values.cluster.enabled -}}
+apiVersion: postgresql.cnpg.io/v1
+kind: ScheduledBackup
+metadata:
+  name: {{ include "Atlantis.fullname" . }}-db
+spec:
+  schedule: "0 0 1 * * *"
+  backupOwnerReference: self
+  cluster:
+    name: '{{ include "Atlantis.fullname" . }}-db'
+{{- end }}