infra[patch]: Add unit tests for Huggingface dataset loader (#14053)
- **Description:** Add unit tests for huggingface dataset loader and
sample huggingface dataset for future tests. Updates dependencies for
`datasets` module.
- Adds coverage for [previous pull
request](https://github.com/langchain-ai/langchain/pull/13864)
- **Tag maintainer:** @hwchase17
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Co-authored-by: Amy Han <amyhan@Amys-Air.lan>
Co-authored-by: Amy Han <amyhan@Amys-MacBook-Air.local>
Co-authored-by: Bagatur <baskaryan@gmail.com>