datasets.load_dataset("code_search_net", "python") : NotADirectoryError: [Errno 20] Not a directory

### Describe the bug

While checking out the [tokenizer tutorial](https://huggingface.co/course/chapter6/2?fw=pt), i noticed getting an error while initially downloading the python dataset used in the examples.

The [collab with the error is here](https://colab.research.google.com/github/huggingface/notebooks/blob/master/course/en/chapter6/section2.ipynb#scrollTo=hGb69Yo3eV8S)

```
from datasets import load_dataset
import os

os.environ["HF_DATASETS_CACHE"] = "/workspace"

# This can take a few minutes to load, so grab a coffee or tea while you wait!
raw_datasets = load_dataset("code_search_net", "python")
```

yeilds:

```
ile /opt/conda/lib/python3.10/site-packages/datasets/download/streaming_download_manager.py:524, in xlistdir(path, use_auth_token)
    522 main_hop, *rest_hops = _as_str(path).split("::")
    523 if is_local_path(main_hop):
--> 524     return os.listdir(path)
    525 else:
    526     # globbing inside a zip in a private repo requires authentication
    527     if not rest_hops and (main_hop.startswith("http://") or main_hop.startswith("https://")):

NotADirectoryError: [Errno 20] Not a directory: '/workspace/downloads/25ceeb4c25ab737d688bd56ea92bfbb1f199fe572470456cf2d675479f342ac7/python/final/jsonl/train'
```

I was able to reproduce this erro both in the collab and on my own pytorch/pytorch container pulled from the dockerhub official pytorch image, so i think it may be a server side thing. 

### Steps to reproduce the bug

Steps to reproduce the issue:

1. run `raw_datasets = load_dataset("code_search_net", "python")`

### Expected behavior

expect the code to not exception during dataset pull.

### Environment info

i tried both the default HF_DATASETS_CACHE on Collab, and on my local container.  i then pointed to the HF_DATASETS_CACHE to a  large capacity local storage and the problem was consisten across all 3 scenarios.

Comments:
Note:
I listed the datasets and grepped around to find what appears to be an alternative source for this:

raw_datasets = load_dataset("espejelomar/code_search_net_python_10000_examples", "python")

Thanks for reporting, @jason-brian-anderson.

Yes, this is a known issue: the [CodeSearchNet](https://github.com/github/CodeSearchNet) repo has been archived (Apr 11, 2023) and their source data files are no longer accessible in their S3: e.g. https://s3.amazonaws.com/code-search-net/CodeSearchNet/v2/python.zip gives 403 Forbidden error. See:
- https://huggingface.co/datasets/code_search_net/discussions/3

We have contacted one of the authors of the dataset to find a solution. I'll keep you informed.

CC: @hamelsmu

cc: @julianeagu

This issue is fixed because we are hosting the CodeSearchNet data files in the Hugging Face Hub. See: https://huggingface.co/datasets/code_search_net/discussions/7

I learned that @mallamanis has uploaded the dataset [here as well](https://zenodo.org/record/7908468) 

Thanks @hamelsmu for the Zenodo link. I am adding it to the dataset card on the Hugging Face Hub, so that the community knows about this "official" source data. I guess this link is not well known, because some community members already hosted an "unofficial" version of the data on Zenodo as well: https://zenodo.org/record/7857872