Streaming the Pile: Missing Files
Hello @FelixLabelle,

As you can see in the Community tab of the corresponding dataset, it is a known issue: https://huggingface.co/datasets/EleutherAI/pile/discussions/15

The data has been taken down due to reported copyright infringement.

Feel free to continue the discussion there.
### Describe the bug

The pile does not stream, a "File not Found error" is returned. It looks like the Pile's files have been moved.

### Steps to reproduce the bug

To reproduce run the following code:

```
from datasets import load_dataset

dataset = load_dataset('EleutherAI/pile', 'en', split='train', streaming=True)
next(iter(dataset))
```

I get the following error:
`FileNotFoundError: https://the-eye.eu/public/AI/pile/train/00.jsonl.zst`

### Expected behavior

Return the data in a stream.

### Environment info

- `datasets` version: 2.12.0
- Platform: Windows-10-10.0.22621-SP0
- Python version: 3.11.5
- Huggingface_hub version: 0.15.1
- PyArrow version: 11.0.0
- Pandas version: 2.0.3