Selector in VolumeGroupSnapshotSource API should be optional

client/config/crd/groupsnapshot.storage.k8s.io_volumegroupsnapshots.yaml

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    api-approved.kubernetes.io: "https://github.com/kubernetes-csi/external-snapshotter/pull/814"
+    api-approved.kubernetes.io: "https://github.com/kubernetes-csi/external-snapshotter/pull/995"
     controller-gen.kubebuilder.io/version: v0.12.0
   creationTimestamp: null
   name: volumegroupsnapshots.groupsnapshot.storage.k8s.io
@@ -78,7 +78,6 @@ spec:
                       is created, the existing group snapshots won't be modified.
                       Once a VolumeGroupSnapshotContent is created and the sidecar
                       starts to process it, the volume list will not change with retries.
-                      Required.
                     properties:
                       matchExpressions:
                         description: matchExpressions is a list of label selector
@@ -129,8 +128,6 @@ spec:
                       if the volume group snapshot already exists and only needs a
                       representation in Kubernetes. This field is immutable.
                     type: string
-                required:
-                - selector
                 type: object
               volumeGroupSnapshotClassName:
                 description: VolumeGroupSnapshotClassName is the name of the VolumeGroupSnapshotClass