Replace default split function with jnp.split() in flax models
Author: premmurugan229
Pull request: yes
Labels: name: Flax

# What does this PR do?


Fixes  (https://github.com/huggingface/transformers/issues/36854)

This issue states the error faced in RoFormer model only but few other models also faced the same issue such as 

- Albertv2
- BigBird
- Distilbert
- Electra

Attached screenshots of the error and the logs after making the changes below

changes related to the above issue are made in 

- src/transformers/models/albert/modeling_flax_albert.py
- src/transformers/models/big_bird/modeling_flax_big_bird.py
- src/transformers/models/distilbert/modeling_flax_distilbert.py
- src/transformers/models/electra/modeling_flax_electra.py
- src/transformers/models/roformer/modeling_flax_roformer.py

## 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#create-a-pull-request),
      Pull Request section?
- [x] Was this discussed/approved via a Github issue or the [forum](https://github.com/huggingface/transformers/issues/36854)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?

Screenshots of models failing 

<img width="1596" alt="Screenshot 2025-03-26 at 7 07 38 PM" src="https://github.com/user-attachments/assets/bb585c23-49c0-48e1-843b-32c0cec910c2" />
<img width="1569" alt="Screenshot 2025-03-26 at 7 07 15 PM" src="https://github.com/user-attachments/assets/81745819-33bd-4521-ae2f-303315c8b5cb" />
<img width="1603" alt="Screenshot 2025-03-26 at 7 06 57 PM" src="https://github.com/user-attachments/assets/7a6c74c0-1d6c-460a-b1a9-44ba9ff87467" />
<img width="1598" alt="Screenshot 2025-03-26 at 7 06 46 PM" src="https://github.com/user-attachments/assets/0f375c06-6ce4-4379-80f6-e1edb2fcd2e8" />


Logs of test files after making the change:
[electra_split.txt](https://github.com/user-attachments/files/19468251/electra_split.txt)
[distilbert_split.txt](https://github.com/user-attachments/files/19468252/distilbert_split.txt)
[big_bird_split.txt](https://github.com/user-attachments/files/19468254/big_bird_split.txt)
[albert_split.txt](https://github.com/user-attachments/files/19468255/albert_split.txt)



## Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

@Rocketknight1 @gante 

<!-- Your PR will be replied to more quickly if you can figure out the right person to tag with @

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 Please tag fewer than 3 people.

Models:

- text models: @ArthurZucker
- vision models: @amyeroberts, @qubvel
- speech models: @eustlb
- graph models: @clefourrier

Library:

- flax: @gante and @Rocketknight1
- 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

Integrations:

- deepspeed: HF Trainer/Accelerate: @muellerzr
- ray/raytune: @richardliaw, @amogkam
- Big Model Inference: @SunMarc
- quantization (bitsandbytes, autogpt): @SunMarc @MekkCyber

Documentation: @stevhliu

HF projects:

- accelerate: [different repo](https://github.com/huggingface/accelerate)
- datasets: [different repo](https://github.com/huggingface/datasets)
- diffusers: [different repo](https://github.com/huggingface/diffusers)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

Maintained examples (not research project or legacy):

- Flax: @Rocketknight1
- PyTorch: See Models above and tag the person corresponding to the modality of the example.
- TensorFlow: @Rocketknight1

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Comments:
Hi 👋, thank you for opening this pull request! The pull request is converted to draft by default. The CI will be paused while the PR is in draft mode. When it is ready for review, please click the `Ready for review` button (at the bottom of the PR page). This will assign reviewers and trigger CI.

LGTM but this PR is quite hard to review right now because of the formatting changes! Try rebasing then `pip install -e .[quality]` in the repo directory to install the right version of the formatting tools, then `make style` or `make fixup`. That should get everything in line with what the CI currently expects, and reduce the list of changed files by a lot.

@Rocketknight1 Thanks for the suggestions. I have made the suggested changes.