fix(modem): workaround to use node16 with checkoutv3

.github/workflows/modem__target-test.yml

@@ -64,21 +64,22 @@ jobs:
             idf_target: "esp32s2"
             test: { app: usb_a7670_s2, path: examples/pppos_client }
     needs: build_esp_modem_tests
-    runs-on:
-      - self-hosted
-      - modem
+    runs-on: [self-hosted, modem]
+    container:
+      image: python:3.11-bookworm
+      options: --privileged # Privileged mode has access to serial ports
     env:
       TEST_DIR: components/esp_modem/${{ matrix.test.path }}
-      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
     steps:
-      - name: Clear repository
-        run: |
-          sudo rm -fr $GITHUB_WORKSPACE && mkdir $GITHUB_WORKSPACE
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/download-artifact@v3
         with:
           name: modem_target_bin_${{ matrix.idf_target }}_${{ matrix.idf_ver }}_${{ matrix.test.app }}
           path: ${{ env.TEST_DIR }}/build
+      - name: Install Python packages
+        env:
+          PIP_EXTRA_INDEX_URL: "https://dl.espressif.com/pypi/"
+        run: pip install --prefer-binary cryptography pytest-embedded pytest-embedded-serial-esp pytest-embedded-idf pytest-custom_exit_code
       - name: Run Example Test on target
         working-directory: ${{ env.TEST_DIR }}
         run: |