### What this PR does / why we need it? Modify the enable range of _merge_multimodal_embeddings patch. The current patch is only enabled for offline inference on the platform. For online serviceization, due to the addition of the worker sub-process, it is not enabled within the sub-process. ### Does this PR introduce _any_ user-facing change? None ### How was this patch tested? - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 Signed-off-by: booker123456 <945658361@qq.com>