[wip] Run system-tests in CI

.github/workflows/tests.yaml

@@ -13,7 +13,8 @@ on:
 
 env:
   SO_VERSION: v1.1.0-36d4969-202407091537
-  FIXTURENET_ETH_STACKS_REF: main
+  FIXTURENET_ETH_STACKS_REF: roysc/set-validator-creds
+  SYSTEM_TESTS_REF: roysc/test-withdrawals
 
 jobs:
   test:
@@ -83,6 +84,21 @@ jobs:
           go install github.com/onsi/ginkgo/v2/ginkgo
           ginkgo -v --label-filter '!proxy' -r ./integration
 
+      - name: Clone system-tests
+        uses: actions/checkout@v4
+        with:
+          repository: cerc-io/system-tests
+          ref: ${{ env.SYSTEM_TESTS_REF }}
+          path: ./system-tests
+          token: ${{ secrets.CICD_REPO_TOKEN }}
+          progress: false
+      - name: Run system tests
+        working-directory: ./system-tests
+        run: |
+          pip install pytest
+          pip install -r requirements.txt
+          pytest -vv
+
       - name: Run testnet stack without statediff
         env:
           CERC_RUN_STATEDIFF: false