Add mm_token_type_ids to qwen3_5_moe lce_forward

[albertvillanova]

Summary

This PR fixes the lce_forward function for qwen3_5_moe model, adding support for mm_token_type_ids optional parameter related to multimodal processing.

Follow-up to:

• Add mm_token_type_ids param to VL models lce_forward to fix ValueError #1120
• Add support for Qwen3.5 MoE #1109

This fixes a ValueError in model.generate() with transformers > 5.2.0, after they merged:

• 🚨 Unify 3D position ids huggingface/transformers#43972

See related issue downstream in TRL:

• ValueError: The following model_kwargs are not used by the model: ['mm_token_type_ids'] huggingface/trl#5216
• CI fails with dev dependencies: ValueError: The following model_kwargs are not used by the model: ['mm_token_type_ids'] huggingface/trl#5201

Testing Done

• Hardware Type:
• run make test to ensure correctness
• run make checkstyle to ensure code style
• run make test-convergence to ensure convergence

[Tcc0403]

Thank you