Added new Spanish translation of autoclass_tutorial
# Translation of autoclass_tutorial.mdx into spanish

I made the translation of autoclass_tutorial.mdx into Spanish (fixes #15947). The document is located in the transformers/docs/source_es folder.

This PR is linked to #16348, which originally had some merge conflicts.

FYI @omarespejel 

## Before submitting
- [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [X] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?

_The documentation is not available anymore as the PR was closed or merged._<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md) are likely to be ignored.<|||||>Hi @Duedme thank you for your new commits. Could you please add `autoclass_tutorial` to `../transformers/docs/source/es/_toctree.yml`. According to the [new Translation](https://github.com/huggingface/transformers/blob/main/docs/TRANSLATING.md) guide? This would allow the tests to pass.
