[Task] Added SiteBench multi-image variant and bug fix

[oscarqjh]

1. Added option to input video as multi image to align with models like SenseNova-SI qwen series that are trained on multi image input. See VSI-Bench_32frame results are not reproducible EASI#20.

sample run result:

2. Fixed the issue in official code where post-prompt and pre-prompt are not extracted properly from lmms_eval_specific_kwargs

[oscarqjh]

@PeterWangyi @kcz358

[oscarqjh]

b792f6c added option to use interleave_visual - this is required to align evaluation result with VLMEvalKit

[PeterWangyi]

It seems that in the Internvl series models, we can only call the doc_to_visual function, but not the doc_to_message function.
This will cause the text-image interleave to fail.