- Update snapshotter module to v6

- Update snapshotter client module to v5
- Update go version in client modules to v1.17

client/apis/volumesnapshot/v1/types.go

@@ -332,6 +332,8 @@ type VolumeSnapshotContentSpec struct {
 	// SourceVolumeMode is the mode of the volume whose snapshot is taken.
 	// Can be either “Filesystem” or “Block”.
 	// If not specified, it indicates the source volume's mode is unknown.
+	// This field is immutable.
+	// This field is an alpha field.
 	// +optional
 	SourceVolumeMode *SourceVolumeMode `json:"sourceVolumeMode" protobuf:"bytes,6,opt,name=sourceVolumeMode"`
 }