esolutions for each downsampling block. Each tensor should
be of shape (batch_size, channel * resolution, height //resolution, width // resolution). Output can be
used to condition the original UNet’s downsampling activations.   mid_down_block_re_sample (torch.Tensor) —
The activation of the midde block (the lowest sample resolution). Each tensor should be of shape
(batch_size, channel * lowest_resolution, height // lowest_resolution, width // 