### What this PR does / why we need it? This PR fixes issues: 1. Solve the problem that multimodal scene cannot do weight prefetching and throw an assertion error exception. 2. Standardize the grid_thw data type of qwen2VL to torch.int32. ### Does this PR introduce _any_ user-facing change? None. ### How was this patch tested? - ci & e2e - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 --------- Signed-off-by: elilzhu <2435754260@qq.com> Co-authored-by: zhulei (AK) <z00692222@china.huawei.com>