Update datasets task tags to align tags with models
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_4067). All of your documentation changes will be reflected on that endpoint.
**Requires https://github.com/huggingface/datasets/pull/4066 to be merged first**

Following https://github.com/huggingface/datasets/pull/4066 we need to update many dataset tags to use the new ones. This PR takes case of this and is quite big - feel free to review only certain tags if you don't want to spend too much time on it.

Note that the CI will never be green for this PR, because many dataset cards have missing tags or sections, and fixing them is out of scope of this PR (the CI on master will be green anyway)