Add support for virtual PiCamera2 to manufacturing/retail

[jimbobbennett]

PiCamera2 is now shipped with the latest Raspberry Pi OS, so we can update the the virtual IoT device code to use a CounterFit version of this.

**This is dependent on this issue being closed: Add shim for PiCamera2

• Update the Capture an image instructions to use the Picamera2 shim
• Add a step to the program the camera task to use Pillow to resize/rotate.

  large_image = Image.open(raw_image)
  image = io.BytesIO()
  large_image = large_image.resize((640, 480))
  large_image.save(image, format='JPEG')
  image.seek(0)

• Update Pi camera code
• Update Pi classify code
• Update Edge classify Pi code
• Update stock detector Pi code
• Update stock counter Pi code