feat: support gpt-4o-audio-preview

[WqyJh]

OpenAI has released a new model gpt-4o-audio-preview which is an end-to-end model for audio input/output. It can be used by chat completion api.

Reference:

• https://platform.openai.com/docs/guides/audio
• https://platform.openai.com/docs/api-reference/chat/create