Missing the MTP module when exporting the Qwen3-Next HF model to an MScore model.

[155394551lzk]

Describe the feature
The MTP module is not seen when exporting the Qwen3-Next HF model to an MScore model. Does the ms-swift 3.9.2 support MTP?

script
export MEGATRON_LM_PATH=$MEGA_PATH
swift export
--model $MODEL
--model-type qwen3_next
--torch_dtype bfloat16
--output_dir $OUT_DIR
--test_convert_precision true
--to_mcore true

Additional context
ms-swift: 3.9.2
transformers: 4.57.1
megatron-core: 0.13.2
transformer_engine: 2.7.0

[Jintao-Huang]

#6496