[Bugfix] Fuse Qwen3.5 in_qkvz_proj forwarding with LoRA enabled#37912

Isotr0py wants to merge 5 commits intovllm-project:mainvllm-project/vllm:mainfrom

Isotr0py:fuse-qwen3_5-loraIsotr0py/vllm:fuse-qwen3_5-loraCopy head branch name to clipboard