Add unpadded Qwen2.5-VL for verl scenario. When using vllm-ascend for verl scenario, set `USE_OPTIMIZED_QWEN2_5_VL` (default `1`) to `0` to use unpadded Qwen2.5-VL to avoid errors. This is cherry-picked from 0.7.3-dev Signed-off-by: shen-shanshan <467638484@qq.com> Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com> Co-authored-by: Shanshan Shen <467638484@qq.com>