[Feature]: Add multi-image input support for LLaVA offline inference (similar to #7230)

[yinsong1986]

🚀 The feature, motivation and pitch

Recently, I released a model https://huggingface.co/aws-prototyping/long-llava-qwen2-7b using the llava model architecture and could support multiple images (or video) as input, so it is reasonable to enable multiple images as a input for llava in vllm also. Thank you!

Alternatives

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Additional context

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[yinsong1986]

Thanks @DarkLight1337 awesome work!