Retrieve DataUpload into backup result ConfigMap during volume snapshot restore.

Fix issue #6117.
Add CSI plugin needs builder functions.

Signed-off-by: Xun Jiang <jxun@vmware.com>

pkg/builder/data_download_builder.go

@@ -5,10 +5,8 @@ Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
-
 http://www.apache.org/licenses/LICENSE-2.0
 
-
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -24,7 +22,6 @@ import (
 	velerov2alpha1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v2alpha1"
 )
 
-
 // DataDownloadBuilder builds DataDownload objects.
 type DataDownloadBuilder struct {
 	object *velerov2alpha1api.DataDownload
@@ -106,10 +103,10 @@ func (d *DataDownloadBuilder) DataMoverConfig(config *map[string]string) *DataDo
 }
 
 // ObjectMeta applies functional options to the DataDownload's ObjectMeta.
-func (b *DataDownloadBuilder) ObjectMeta(opts ...ObjectMetaOpt) *DataDownloadBuilder {
+func (d *DataDownloadBuilder) ObjectMeta(opts ...ObjectMetaOpt) *DataDownloadBuilder {
 	for _, opt := range opts {
-		opt(b.object)
+		opt(d.object)
 	}
 
-	return b
+	return d
 }