Merge pull request #53588 from NickrenREN/openstack-deletevolume

Automatic merge from submit-queue (batch tested with PRs 52662, 53547, 53588, 53573, 53599). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Return err when delete volume failed

Return err when delete volume failed

**Release note**:
```release-note
NONE
```

/kind bug
/sig openstack

Author: Kubernetes Submit Queue

pkg/cloudprovider/providers/openstack/openstack_volumes.go

@@ -374,7 +374,7 @@ func (os *OpenStack) DeleteVolume(volumeID string) error {
 	if err != nil {
 		glog.Errorf("Cannot delete volume %s: %v", volumeID, err)
 	}
-	return nil
+	return err
 
 }