Add try-except for torch_scatter
Add an error message for the CUDA version mismatch of `torch_scatter`.


I don't think this will work. It's a `RuntimeError` being raised by `torch_scatter`, not an `OSError`. See the specific code at [line 59 of `__init__.py`](https://github.com/rusty1s/pytorch_scatter/blob/2.0.8/torch_scatter/__init__.py#L59). Also, this replaces the existing informative error message from `torch_scatter` with a less informative one.<|||||>@aphedges Thanks for the note - I have edited the description that does not indicate the association with your issue anymore. Also, the intention of this PR is to simply circumvent the error since in most cases, people just don't use TAPAS but still get blocked by this error.

Also, the original `torch_scatter` error message is not informative at all. It just says some file cannot be located and after some googling, I realize it's due to the CUDA version. So I'm basically replacing that with my googled solution.<|||||>@JetRunner, thanks for editing the description!

Sorry about my note about `RuntimeError` vs. `OSError` earlier. I think I got confused by the fact that `torch-scatter` explicitly throws a runtime error for some CUDA version mismatches, but the error you're logging here is for a different CUDA version mismatch that doesn't have a good error message. I think I had to google this one, too, so your error message is definitely an improvement.