Don't save dataset info to cache dir when skipping verifications
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_5607). All of your documentation changes will be reflected on that endpoint.
I think it makes sense not to save `dataset_info.json` file to a dataset cache directory when loading dataset with `verification_mode="no_checks"` because otherwise when next time the dataset is loaded **without** `verification_mode="no_checks"`, it will be loaded successfully, despite some values in info might not correspond to the ones in the repo which was the reason for using `verification_mode="no_checks"` first.  