[CICD] Add MetaX graph serving smoke cases#327

HermiaHuan wants to merge 4 commits into

flagos-ai:mainflagos-ai/vllm-plugin-FL:mainfrom

BrianPei:PR-0730-metax-graph-servingBrianPei/vllm-plugin-FL:PR-0730-metax-graph-servingCopy head branch name to clipboard