Fix some MoE routers
Author: IlyasMoutawwakil
Pull request: yes

# What does this PR do?

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Same as https://github.com/huggingface/transformers/pull/43288
Also fixes phimoe and its integration tests


## 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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- [ ] Did you write any new necessary tests?


## Who can review?

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Models:

- text models: @ArthurZucker @Cyrilvallez
- vision models: @yonigozlan @molbap
- audio models: @eustlb @ebezzam @vasqu
- multimodal models: @zucchini-nlp
- graph models: @clefourrier

Library:

- generate: @zucchini-nlp (visual-language models) or @gante (all others)
- continuous batching: @remi-or @ArthurZucker @McPatate
- pipelines: @Rocketknight1
- tokenizers: @ArthurZucker and @itazap
- trainer: @SunMarc
- attention: @vasqu @ArthurZucker @CyrilVallez
- model loading (from pretrained, etc): @CyrilVallez
- distributed: @3outeille @ArthurZucker
- CIs: @ydshieh

Integrations:

- ray/raytune: @richardliaw, @amogkam
- Big Model Inference: @SunMarc
- quantization: @SunMarc @MekkCyber
- kernels: @MekkCyber @drbh
- peft: @BenjaminBossan @githubnemo

Devices/Backends:

- AMD ROCm: @ivarflakstad
- Intel XPU: @IlyasMoutawwakil
- Ascend NPU: @ivarflakstad 

Documentation: @stevhliu

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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_43445). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

run-slow: hunyuan_v1_moe, phimoe

This comment contains `run-slow`, running the specified jobs: 

models: ["models/hunyuan_v1_moe", "models/phimoe"]
quantizations: []

## CI Results
[Workflow Run ⚙️](https://github.com/huggingface/transformers/actions/runs/21353212690)

✅ No failing test specific to this PR 🎉 !


both models integration tests pass locally now

run-slow: hunyuan_v1_moe, phimoe

This comment contains `run-slow`, running the specified jobs: 

models: ["models/hunyuan_v1_moe", "models/phimoe"]
quantizations: []

## CI Results
[Workflow Run ⚙️](https://github.com/huggingface/transformers/actions/runs/21361994254)

✅ No failing test specific to this PR 🎉 !


the ci is struggling with model loading again 😭, even though `device_map="auto"`

**[For maintainers]** Suggested jobs to run (before merge)

run-slow: hunyuan_v1_moe, phimoe