Fix proxy setting in backend workflow (#2650)

Author: tengqm

.github/workflows/backend-test.yaml

@@ -61,6 +61,8 @@ jobs:
           ssh-key: ${{ secrets.RUNNER_SSH_KEY }}
       - name: Setup FlagGems
         shell: bash
+        env:
+          RUNNER_LABEL: ${{ inputs.runner_label }}
         run: |
           if [[ "${RUNNER_LABEL}" != "h20" ]]; then
             export HTTP_PROXY="http://10.1.12.38:38002"
@@ -84,6 +86,5 @@ jobs:
         shell: bash
         env:
           CHANGED_FILES: ${{ inputs.changed_files }}
-          RUNNER_LABEL: ${{ inputs.runner_label }}
         run: |
           tools/test-op.sh ${{ inputs.pr_id }}

setup.sh

@@ -99,8 +99,8 @@ else
   source .venv/bin/activate
 fi
 
-printf "HTTPS_PROXY=${https_proxy}\n"
-printf "HTTP_PROXY=${http_proxy}\n"
+printf "HTTPS_PROXY=${HTTPS_PROXY}\n"
+printf "HTTP_PROXY=${HTTP_PROXY}\n"
 
 # Install FlagGems
 export FLAGOS_PYPI="https://resource.flagos.net/repository/flagos-pypi-${VENDOR}/simple"