[CI] Rewrite killall_sglang as Python with CI/local dual mode (#21331)

Co-authored-by: Alison Shao <alison.shao@mac.lan>
Co-authored-by: Alison Shao <alison.shao@MacBook-Pro-D2W773R9CD.local>
Co-authored-by: hnyls2002 <lsyincs@gmail.com>
Co-authored-by: Liangsheng Yin <hnyls2002@gmail.com>

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

@@ -19,6 +19,7 @@ concurrency:
 env:
   RUSTC_WRAPPER: sccache
   SCCACHE_GHA_ENABLED: "true"
+  SGLANG_IS_IN_CI: true
 
 jobs:
   build-wheel:
@@ -287,7 +288,7 @@ jobs:
 
       - name: Run E2E tests
         run: |
-          bash scripts/killall_sglang.sh all
+          python3 python/sglang/cli/killall.py
           cd sgl-model-gateway
           ${{ matrix.env_vars }} ROUTER_LOCAL_MODEL_PATH="/home/ubuntu/models" pytest ${{ matrix.reruns }} ${{ matrix.parallel_opts }} ${{ matrix.test_dirs }} -s -vv -o log_cli=true --log-cli-level=INFO