Add `token` arugment in example scripts
# What does this PR do?

If the change is good, I will apply the same to other files.

Let me know if you have opinion on the `False` vs `None` thing here.
_The documentation is not available anymore as the PR was closed or merged._<|||||>@sgugger  Ready to go 🚀 <|||||>Thank you for the review, changed it to

```python
    token: str = field(
        default=None,
        metadata={
            "help": (
                "The token to use as HTTP bearer authorization for remote files. If not specified, will use the token "
                "generated when running `huggingface-cli login` (stored in `~/.huggingface`)."
            )
        },
    )
    use_auth_token: bool = field(
        default=None,
        metadata={
            "help": "The `use_auth_token` argument is deprecated and will be removed in v4.34. Please use `token`."
        },
    )
```