Updated separation of SaaS tests

Following the strategy as demonstrated in GitHub repository saas-api-python.

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     name: Checks
     uses: ./.github/workflows/checks.yml
 
-  tests-job:
+  fast-tests:
     name: Tests (Python-${{ matrix.python-version }})
     runs-on: ubuntu-latest
     strategy:
@@ -29,42 +29,69 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v5
+
+      - name: Setup Python & Poetry Environment
+        uses: exasol/python-toolbox/.github/actions/[email protected]
         with:
           python-version: ${{ matrix.python-version }}
-      - uses: abatilo/[email protected]
-        with:
           poetry-version: 1.2.2
 
-      - name: Install Project
-        run: poetry install
-
       - name: Checkout ITDE
         run: git clone https://github.com/exasol/integration-test-docker-environment.git
         working-directory: ..
 
-      - name: Start EXASOL Test-Environment
+      - name: Start EXASOL Test-Docker-Environment (ITDE)
         run: ./start-test-env spawn-test-environment --environment-name test --database-port-forward 8888 --bucketfs-port-forward 6666 --db-mem-size 4GB
         working-directory: ../integration-test-docker-environment
 
       - name: Run Tests
         run: poetry run pytest tests
 
-      - name: Fail, if SaaS tests are not activated
-        if: "!contains(github.event.head_commit.message, '[run-saas-tests]') && (matrix.python-version == '3.10')"
-        run: |
-          echo "Failed because the SaaS tests are not activated"
-          exit 1
+  metrics:
+    needs: [ fast-tests ]
+    uses: ./.github/workflows/report.yml
+
+  gate-1:
+    name: Gate 1 - Regular CI
+    needs: [ fast-tests ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Branch Protection
+        run: true
+
+  slow-test-detection:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Detect Slow Tests
+        run: true
+    environment:
+      slow-tests
+
+  run-slow-tests:
+    runs-on: ubuntu-latest
+    needs: [ slow-test-detection ]
+    secrets: inherit
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Python & Poetry Environment
+        uses: exasol/python-toolbox/.github/actions/[email protected]
+        with:
+          python-version: 3.10
+          poetry-version: 1.2.2
 
       - name: Run SaaS Tests
-        if: "contains(github.event.head_commit.message, '[run-saas-tests]') && (matrix.python-version == '3.10')"
         env:
           SAAS_HOST: ${{ secrets.INTEGRATION_TEAM_SAAS_STAGING_HOST }}
           SAAS_ACCOUNT_ID: ${{ secrets.INTEGRATION_TEAM_SAAS_STAGING_ACCOUNT_ID }}
           SAAS_PAT: ${{ secrets.INTEGRATION_TEAM_SAAS_STAGING_PAT }}
         run: poetry run pytest test_saas
 
-
-  metrics:
-    needs: [ ci-job ]
-    uses: ./.github/workflows/report.yml
+  gate-2:
+    name: Gate 2 - Allow Merge
+    runs-on: ubuntu-latest
+    needs: [ run-slow-tests ]
+    steps:
+      - name: Branch Protection
+        run: true