fix(postgres): configure AWS region

cnpg/resources/cluster.yaml

@@ -25,8 +25,8 @@ spec:
 
   backup:
     barmanObjectStore:
-      destinationPath: s3://cnpg
-      endpointURL: http://garage.garage.svc:3900
+      destinationPath: "s3://cnpg/app-cluster/"
+      endpointURL: "http://garage.garage.svc:3900"
       s3Credentials:
         accessKeyId:
           name: cnpg-backup-creds
@@ -34,6 +34,9 @@ spec:
         secretAccessKey:
           name: cnpg-backup-creds
           key: ACCESS_SECRET_KEY
+        region:
+          name: cnpg-backup-creds
+          key: AWS_REGION
       wal:
         compression: snappy
     retentionPolicy: "30d"