[wwb] Add video generation to wwb

[sbalandi]

Description

How to run:

cd ./openvino.genai/tools/who_what_benchmark
pip install .
python ./whowhatbench/wwb.py --base-model Lightricks/LTX-Video --gt-data ltx_gt.csv --model-type text-to-video --num-inference-steps 40 --video-frames-num 25

optimum-cli export openvino -m Lightricks/LTX-Video ./models/ltx_video
python ./whowhatbench/wwb.py --target-model ./models/ltx_video --gt-data ltx_gt.csv --model-type text-to-video  -v --output ./output/  --num-inference-steps 40 --video-frames-num 25

CVS-176896

Fixes #(issue)

Checklist:

• Tests have been updated or added to cover the new code.
• This patch fully addresses the ticket.
• I have made corresponding changes to the documentation.