Cleanup labels

See if we can/should clean up some of our labels.

Some notes:

- [x] remove `rust` label
- https://github.com/apache/arrow-rs/pull/10456
- [x] remove `stale-pr` label (we already have `Stale` from the workflow)
- [ ] deprecate `next-major-release` in favour of `api-change` since these are almost always used as a pair?
- [ ] we have both `dependencies` and `auto-dependencies` 🤔
- [x] we have both `parquet_derive` and `parquet-derive`
- [ ] should we maintain our labels in [.asf.yaml](https://github.com/apache/arrow-rs/blob/main/.asf.yaml)?
- it does state we are technically only allowed 20, but we currently have more than 20 labels: https://github.com/apache/infrastructure-asfyaml/blob/main/README.md#repository-metadata
- [ ] maybe update some of their descriptions