Please add support for mistral3 models for openvino export

[yuanpf123]

Need support for mistral3 model: https://huggingface.co/mistralai/Mistral-Small-3.1-24B-Instruct-2503

Currently it gives below error:

[IlyasMoutawwakil]

Hi ! would be very happy to review a PR adding support for that model type 🤗

[SearchSavior]

@yuanpf123 versions of mistral 3 which do not have the vision encoder can be converted to openvino IR since the language model component uses MistralForCausalLM. My most recent upload was https://huggingface.co/Echo9Zulu/MS3.2-24B-Magnum-Diamond-int4_asym-ov