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/resources/backup.yaml

@@ -0,0 +1,13 @@
+apiVersion: "etcd.database.coreos.com/v1beta2"
+kind: "EtcdBackup"
+metadata:
+  name: vault-backup
+  namespace: "vault-operator"
+spec:
+  etcdEndpoints: ["https://vault-etcd-client:2379"]
+  storageType: S3
+  clientTLSSecret: vault-etcd-client-tls
+  s3:
+    path: vault/backup-manual
+    awsSecret: aws
+    endpoint: http://minio.minio.svc:9000

molgenis-vault/resources/restore.yaml

@@ -9,7 +9,8 @@ spec:
   etcdCluster:
     # The namespace is the same as this EtcdRestore CR
     name: vault-etcd
-  backupStorageType: ABS
-  abs:
-    path: vault/backup-<specify the backup name>
-    absSecret: abs
+  backupStorageType: S3
+  s3:
+    path: vault/backup-<name>
+    awsSecret: aws
+    endpoint: http://minio.minio.svc:9000