Fix Hub datasets after updating datasets to 2.14.6
After deploying PR:
- #2007

We need to fix/refresh Hub datasets:
- [x] Raise `DefunctDatasetError` from datasets with taken down data
- [x] Refresh viewer of datasets with `metadata.csv`
  - [x] 27 datasets, e.g. https://huggingface.co/datasets/lukarape/public_small_papers/discussions/1
- [x] Refresh viewer of datasets with 'data' word twice
  - [x] 270 datasets, e.g. https://huggingface.co/datasets/piuba-bigdata/articles_and_comments/discussions/1
Fix Hub datasets after updating datasets to 2.14.6: After deploying PR:
- #2007

We need to fix/refresh Hub datasets:
- [x] Raise `DefunctDatasetError` from datasets with taken down data
- [x] Refresh viewer of datasets with `metadata.csv`
  - [x] 27 datasets, e.g. https://huggingface.co/datasets/lukarape/public_small_papers/discussions/1
- [x] Refresh viewer of datasets with 'data' word twice
  - [x] 270 datasets, e.g. https://huggingface.co/datasets/piuba-bigdata/articles_and_comments/discussions/1