vllm

ec154c36 - [Platform] Refactor Platform attention backend selection to avoid breakpoint for OOT platform (#30212)

[Platform] Refactor Platform attention backend selection to avoid breakpoint for OOT platform (#30212) Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn> Signed-off-by: Isotr0py <2037008807@qq.com> Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>