resize fs only if needed

mount-utils now provides a function to check if a filesystem needs
resizing which helps optimize the flow and eliminate unnecessary
resize attempts.

pkg/ibmcsidriver/node.go

@@ -545,8 +545,14 @@ func (su *VolumeStatUtils) IsDevicePathNotExist(devicePath string) bool {
 // Resize expands the fs
 func (volMountUtils *VolumeMountUtils) Resize(mounter mountmanager.Mounter, devicePath string, deviceMountPath string) (bool, error) {
 	r := mount.NewResizeFs(mounter.NewSafeFormatAndMount().Exec)
-	if _, err := r.Resize(devicePath, deviceMountPath); err != nil {
-		return false, err
+	needResize, err := r.NeedResize(devicePath, deviceMountPath)
+	if err != nil {
+		return false, status.Errorf(codes.Internal, "Could not determine if device %q needs to be resized: %v", devicePath, err)
+	}
+	if needResize {
+		if _, err := r.Resize(devicePath, deviceMountPath); err != nil {
+			return false, err
+		}
 	}
 	return true, nil
 }