Function align_depth_scale

Align `depth_src` to `depth_tgt` with given constant weights. ### Parameters: - `depth_src: torch.Tensor` of shape (..., N) - `depth_tgt: torch.Tensor` of shape (..., N)

(
    depth_src: torch.Tensor, 
    depth_tgt: torch.Tensor, 
    weight: Optional[torch.Tensor], 
    trunc: Optional[Union[float, torch.Tensor]] = None
)