Add cluster run as optional runs

Author: jianghao0718

.github/workflows/integration-tests.yml

@@ -37,6 +37,31 @@ jobs:
           janky-token: '${{ secrets.API_AUTH_TOKEN }}'
           job-name: '${{ matrix.jankyJobName }}'
           branch-name: '${{ env.SOURCE_BRANCH }}'
-          force : "true"
+          # enterprise2 target branch is same as target branch for PR (either master or enterprise-[0-9]*.[0-9]*-release)
+          envVars: "JANKY_ENV_BACKUP_UTILS_BRANCH=${{ env.SOURCE_BRANCH }},JANKY_ENV_ENTERPRISE2_BRANCH=${{ env.TARGET_BRANCH }}"
+
+  # Cluster integration tests are optional based on label and PR titles
+  cluster-integration-tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        jankyJobName:
+        - enterprise2-backup-utils-cluster-binary-backup
+        - enterprise2-backup-utils-cluster-migration
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 1
+      - name: Queue ${{ matrix.jankyJobName }} build
+        if: |
+          github.event_name == 'workflow_dispatch' ||
+          contains(github.event.pull_request.title, '[cluster]') ||
+          contains(github.event.pull_request.labels.*.name, 'cluster')
+        uses: ./.github/actions/proxy-janky-build
+        id: proxy-janky-build
+        with:
+          janky-token: '${{ secrets.API_AUTH_TOKEN }}'
+          job-name: '${{ matrix.jankyJobName }}'
+          branch-name: '${{ env.SOURCE_BRANCH }}'
           # enterprise2 target branch is same as target branch for PR (either master or enterprise-[0-9]*.[0-9]*-release)
           envVars: "JANKY_ENV_BACKUP_UTILS_BRANCH=${{ env.SOURCE_BRANCH }},JANKY_ENV_ENTERPRISE2_BRANCH=${{ env.TARGET_BRANCH }}"