Update configuration_qwen2.py
Author: michaelfeil
Pull request: yes

# What does this PR do?

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Fixes # (issue)
Adds qwen2moe without bias support.

## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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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)
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- trainer: @muellerzr and @SunMarc
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Comments:
Hi 👋, thank you for opening this pull request! The pull request is converted to draft by default. When it is ready for review, please click the `Ready for review` button (at the bottom of the PR page).

run-slow: qwen2_moe

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

models: ['models/qwen2_moe']
quantizations: [] ...

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_36735). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

A couple of slow tests failed but this is because the test runner crashed! I ran slow tests locally and there were no additional test failures on the PR branch compared to main. A couple of tests failed on both main and this branch because my GPU couldn't fit them, but that shouldn't be relevant

Thanks for the review!

Merging! The slow test runner crashed in the CI but I ran them locally and there are no new errors in this PR branch.