fix: change moe model for compatibility with earlier transformers versions

[gsprochette]

Description

Change the moe test model because qwen3-next is only compatible with transformers>=4.57, sometimes breaking the CI because an older version is installed.

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

The ReduceNOE test passes on all currently compatible transformers versions from 4.50 to 4.57

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

[llcnt]

thanks for the fix!