Add state field to ResyncVolumeResponse

[Madhu-1]

Add state file to the ResyncVolumeResponse to provide more clarity about the current state of the volume

message ResyncVolumeResponse{
  // Indicates that the volume is ready to use.
  // The default value is false.
  // This field is REQUIRED.
  bool ready = 1;
  // Represents the current state of the volume which is helpful to provide the state of the volume to the user. 
  // with this user can identify that the image is still resyncing, completed, stated to resync, or failed to resync.
  string state =2;
}

[nixpanic]

I assume the new state becomes OPTIONAL?

[Madhu-1]

Yes, it would be optional.