Add new check for nightly firestore check (#5594)

Author: wu-hui

.github/workflows/ci_tests.yml

@@ -199,6 +199,50 @@ jobs:
         run: |
           ./gradlew firebase-firestore:deviceCheck withErrorProne -PtargetBackend="prod" -PtargetDatabaseId="test-db"
 
+
+  firestore_nightly_integ_tests:
+    name: "Firestore Instrumentation Tests Against Nightly Environment"
+    runs-on: ubuntu-22.04
+    needs:
+      - determine_changed
+    # only run on post submit or PRs not originating from forks.
+    if: ((github.repository == 'Firebase/firebase-android-sdk' && github.event_name == 'push') || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository)) && contains(fromJSON(needs.determine_changed.outputs.modules), ':firebase-firestore')
+    strategy:
+      fail-fast: false
+
+    steps:
+      - uses: actions/[email protected]
+        with:
+          fetch-depth: 2
+          submodules: true
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: temurin
+          cache: gradle
+
+      - name: Add google-services.json
+        env:
+          INTEG_TESTS_GOOGLE_SERVICES: ${{ secrets.NIGHTLY_INTEG_TESTS_GOOGLE_SERVICES }}
+        run: |
+          echo $INTEG_TESTS_GOOGLE_SERVICES > google-services.json
+      - uses: google-github-actions/auth@v0
+        with:
+          credentials_json: ${{ secrets.GCP_SERVICE_ACCOUNT }}
+      - uses: google-github-actions/setup-gcloud@v0
+
+      - name: Firestore Nightly Integ Tests
+        env:
+          FIREBASE_CI: 1
+          FTL_RESULTS_BUCKET: android-ci
+          FTL_RESULTS_DIR: ${{ github.event_name == 'pull_request' && format('pr-logs/pull/{0}/{1}/{2}/{3}_{4}/artifacts/', github.repository, github.event.pull_request.number, github.job, github.run_id, github.run_attempt) || format('logs/{0}/{1}_{2}/artifacts/', github.workflow, github.run_id, github.run_attempt)}}
+          FIREBASE_APP_CHECK_DEBUG_SECRET: ${{ secrets.FIREBASE_APP_CHECK_DEBUG_SECRET }}
+        run: |
+          ./gradlew firebase-firestore:deviceCheck withErrorProne -PtargetBackend="nightly"
+
+
   publish-test-results:
     name: "Publish Tests Results"
     needs: