#29570 [Feature]: Add support for the volcanic ark
### Check for existing issues
- [x] I have searched the existing issues and checked that my issue is not a duplicate.
### The Feature
Add support for the volcanic ark doubao-embedding-vision-251215 model
### Motivation, pitch
The closed pure text vectorization model of Volcano Ark only provides this multimodal vectorization model, and the calling method of this model is different from that of text: input=[ {"type": "text", "text": "This painting depicts a serene rural scenery"}, {"type": "image_url", "image_url": {"url": "https://example.com/countryside.jpg"}} ],
### What part of LiteLLM is this about?
_No response_
### LiteLLM is hiring a founding backend engineer, are you interested in joining us and shipping to all our users?
No
### Twitter / LinkedIn details
_No response_