test: fixed video_sender tests

ref: N25B-393

src/robot_interface/endpoints/video_sender.py

@@ -3,6 +3,7 @@ import threading
 import logging
 
 import numpy as np
+import struct
 
 from robot_interface.endpoints.socket_base import SocketBase
 from robot_interface.state import state
@@ -63,8 +64,8 @@ class VideoSender(SocketBase):
                         width = img[0]
                         height = img[1]
 
-                        width_bytes = width.to_bytes(4, 'little')
-                        height_bytes = height.to_bytes(4, 'little')
+                        width_bytes = struct.pack('<I', width)
+                        height_bytes = struct.pack('<I', height)
 
                         self.socket.send_multipart([width_bytes, height_bytes, raw_data])
                 except: