please add qwen2-5-omni support in OpenVINO

Just tried to do export Qwen2.5-Omni-7B to OpenVINO but failed. It looks that it hasn't been supported yet. Please add it.

`optimum-cli export openvino --model Qwen/Qwen2.5-Omni-7B Qwen2.5-Omni-7B\FP16 --weight-format fp16`
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`ValueError: Trying to export a qwen2-5-omni model, that is a custom or unsupported architecture, but no custom export configuration was passed as `custom_export_configs`. Please refer to https://huggingface.co/docs/optimum/main/en/exporters/onnx/usage_guides/export_a_model#custom-export-of-transformers-models for an example on how to export custom models. Please open an issue at https://github.com/huggingface/optimum-intel/issues if you would like the model type qwen2-5-omni to be supported natively in the OpenVINO export.`