[router] allow longer time out for router e2e (#8560)

Author: slin1237

.github/workflows/pr-test-rust.yml

@@ -57,6 +57,7 @@ jobs:
   e2e-python:
     if: github.repository == 'sgl-project/sglang' || github.event_name == 'pull_request'
     runs-on: 2-gpu-runner
+    timeout-minutes: 30
     steps:
       - name: Checkout code
         uses: actions/checkout@v4