Run system tests on GitHub Actions

Closes gh-40446

.github/workflows/run-system-tests.yml

@@ -0,0 +1,45 @@
+name: Run System Tests
+on:
+  push:
+    branches:
+      - 3.1.x
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+jobs:
+  run-system-tests:
+    name: 'Java ${{ matrix.java.version}}'
+    runs-on: ubuntu22-8-32
+    if: ${{ github.repository == 'spring-projects/spring-boot' }}
+    strategy:
+      matrix:
+        java:
+          - version: 17
+            toolchain: false
+          - version: 21
+            toolchain: true
+    steps:
+      - name: Check Out Code
+        uses: actions/checkout@v4
+      - name: Prepare Gradle Build
+        uses: ./.github/actions/prepare-gradle-build
+        with:
+          java-version: ${{ matrix.java.version }}
+          java-toolchain: ${{ matrix.java.toolchain }}
+      - name: Run System Tests
+        id: run-system-tests
+        shell: bash
+        env:
+          GRADLE_ENTERPRISE_URL: 'https://ge.spring.io'
+          GRADLE_ENTERPRISE_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
+          GRADLE_ENTERPRISE_CACHE_USERNAME: ${{ secrets.GRADLE_ENTERPRISE_CACHE_USER }}
+          GRADLE_ENTERPRISE_CACHE_PASSWORD: ${{ secrets.GRADLE_ENTERPRISE_CACHE_PASSWORD }}
+        run: |
+          ./gradlew systemTest
+      - name: Send Notification
+        uses: ./.github/actions/send-notification
+        if: always()
+        with:
+          webhook-url: ${{ secrets.GOOGLE_CHAT_WEBHOOK_URL }}
+          status: ${{ job.status }}
+          build-scan-url: ${{ steps.run-system-tests.outputs.build-scan-url }}
+          run-name: ${{ format('{0} | System Tests | Java {1}', github.ref_name, matrix.java.version) }}