[fix] fix token healing tests and usage errors
Author: alpertunga-bile
Pull request: yes

# What does this PR do?

Hello! As I described in the #33827; token healing functionality is failing in usage and tests.

This PR is fixing the token healing tests and usage bugs.

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Fixes #33827 

## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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Pull Request section?
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      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?

@gante 

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- generate: @zucchini-nlp (visual-language models) or @gante (all others)
- pipelines: @Rocketknight1
- tensorflow: @gante and @Rocketknight1
- tokenizers: @ArthurZucker
- trainer: @muellerzr and @SunMarc
- chat templates: @Rocketknight1

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- deepspeed: HF Trainer/Accelerate: @muellerzr
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- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

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Comments:
cc @gante! 🤗 

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_33931). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

The red CI should get fixed after #33950 is merged. At that point, I'd like to kindly ask you to rebase and force-push, to re-run CI 🤗  

@e can see token healing tests being run in the CI 👍  from https://app.circleci.com/pipelines/github/huggingface/transformers/106787/workflows/081efefd-ecd1-4eed-8496-b4d03d6e492e/jobs/1417470/parallel-runs/7?filterBy=ALL :
<img width="1024" alt="Screenshot 2024-10-07 at 14 09 12" src="https://github.com/user-attachments/assets/63e29061-396c-492d-9908-b9b960bc88bf">

<img width="927" alt="Screenshot 2024-10-07 at 14 10 33" src="https://github.com/user-attachments/assets/8cffe94c-5fd2-45a5-9cbe-ae721e96a639">



> The red CI should get fixed after #33950 is merged. At that point, I'd like to kindly ask you to rebase and force-push, to re-run CI 🤗

Uhh, my bad. Sorry, i understand it wrong. I will add comments to my changes and push it to re-run the CI when #33950 is merged.

cc @ArthurZucker as we just discussed it in person

@gante I ran CI again after the #33950 PR was merged but now a test named ```pipelines_torch``` is failing. After which PR do I need to run CI again?

@alpertunga-bile sorry about that :( https://github.com/huggingface/transformers/pull/34067 -- this would be the PR

> @alpertunga-bile sorry about that :( #34067 -- this would be the PR

Thanks, it is passed through the tests now.