feat (molgenis-vault): Switch backup storage to s3.

We can host s3 compatible storage locally by deploying the stable/minio chart.
Ran into https://github.com/coreos/etcd-operator/issues/1980 and therefore downgrade the backup and restore operator images to 0.8.3.

molgenis-vault/templates/NOTES.txt

@@ -10,8 +10,10 @@ Next steps:
 !!!!!! BACKUP JOB SUSPENDED !!!!!!
 {{ else }}
 {{- if .Values.s3.endpoint -}}
-Backing up to non-standard s3 endpoint {{ .Values.s3.endpoint }} {{ else -}}
-Backing up to S3 on aws {{ end -}}
-in bucket {{ .Values.s3.bucket }}.
+Backing up to non-standard s3 endpoint {{ .Values.s3.endpoint }}
+{{- else }}
+Backing up to S3 on aws
+{{- end }}
+ in bucket {{ .Values.s3.bucket }}.
 !! Make sure to check if the backups succeed !!
 {{ end }}