VolumeSnapshotLocation refactor with kubebuilder.

1. modify VSL CRD API file name. Add kubebuilder related marker.
2. Add Labels init code for VSL create command.

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

pkg/cmd/cli/snapshotlocation/create.go

@@ -63,6 +63,7 @@ type CreateOptions struct {
 func NewCreateOptions() *CreateOptions {
 	return &CreateOptions{
 		Config: flag.NewMap(),
+		Labels: flag.NewMap(),
 	}
 }