[Model] Support bitsandbytes for MiniCPMV

[mgoin]

Requires #9887

FIX #6932
FIX #7727

Note that the arguments --quantization bitsandbytes --load-format bitsandbytes are required because of the weight -> qweight loading.

Tested with:

vllm serve openbmb/MiniCPM-V-2_6-int4 --trust-remote-code --quantization bitsandbytes --load-format bitsandbytes

and

vllm serve mgoin/MiniCPM-Llama3-V-2_5-int4 --trust-remote-code --quantization bitsandbytes --load-format bitsandbytes

[github-actions]

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[DarkLight1337]

Thanks for adding support!