[bugfix] [AMD] add multi-step advance_step to ROCmFlashAttentionMetadata#8474

simon-mo merged 2 commits intovllm-project:mainvllm-project/vllm:mainfrom

SolitaryThinker:ms-rocm-advance-stepSolitaryThinker/vllm:ms-rocm-advance-stepCopy head branch name to clipboard