[CI] Fix unit-test-backend-8-gpu-b200 running on every /rerun-stage#14591

Kangyan-Zhou merged 1 commit intomainsgl-project/sglang:mainfrom

fix-rerun-stage-8gpu-b200-conditionsgl-project/sglang:fix-rerun-stage-8gpu-b200-conditionCopy head branch name to clipboard