[CI] Add integration test support (#357)

The `PulsarFunctionAdministrationIntegrationTests` was causing an OOM 
because it copies a large archive into memory in order to setup its 
testcontainers.

The unit tests running in parallel consume most of the available resources 
so we split the ITs into their own step in the workflow and all is happy.

This is also good to have support for integration tests in the project.

.github/workflows/ci-pr.yml

@@ -34,9 +34,13 @@ jobs:
         env:
           GRADLE_USER_HOME: ~/.gradle
 
-      - name: Run Gradle build
+      - name: Build and run unit tests
         run: |
-          ./gradlew clean build -DdownloadRabbitConnector=false --continue --scan
+          ./gradlew clean build -x integrationTest --continue --scan
+
+      - name: Run integration tests
+        run: |
+          ./gradlew integrationTest --rerun-tasks -DdownloadRabbitConnector=true --scan
 
       - name: Capture Test Results
         if: failure()

.github/workflows/ci.yml

@@ -39,9 +39,12 @@ jobs:
         uses: gradle/gradle-build-action@v2
         env:
           GRADLE_USER_HOME: ~/.gradle
-      - name: Run Gradle build
+      - name: Build and run unit tests
         run: |
-          ./gradlew clean build -DdownloadRabbitConnector=false --continue -PartifactoryUsername="$ARTIFACTORY_USERNAME" -PartifactoryPassword="$ARTIFACTORY_PASSWORD"
+          ./gradlew clean build -x integrationTest --continue --scan -PartifactoryUsername="$ARTIFACTORY_USERNAME" -PartifactoryPassword="$ARTIFACTORY_PASSWORD"
+      - name: Run integration tests
+        run: |
+          ./gradlew integrationTest --rerun-tasks -DdownloadRabbitConnector=true --scan
       - name: Capture test results
         if: failure()
         uses: actions/upload-artifact@v3