Use filerGroup for s3 buckets collection prefix (#4465)

* Use filerGroup for s3 buckets collection prefix

* Fix templates

* Remove flags

* Remove s3CollectionPrefix

weed/shell/command_s3_bucket_delete.go

@@ -54,7 +54,7 @@ func (c *commandS3BucketDelete) Do(args []string, commandEnv *CommandEnv, writer
 	// delete the collection directly first
 	err = commandEnv.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
 		_, err = client.CollectionDelete(context.Background(), &master_pb.CollectionDeleteRequest{
-			Name: *bucketName,
+			Name: getCollectionName(commandEnv, *bucketName),
 		})
 		return err
 	})