Run system tests on GitHub Actions

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

@@ -0,0 +1,61 @@
+name: Run System Tests
+on:
+  push:
+    branches:
+      - gha-system-tests
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+jobs:
+  run-system-tests:
+    name: '${{ matrix.os.name}} | Java ${{ matrix.java.version}}'
+    runs-on: ubuntu-latest
+    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: Set Up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'liberica'
+          java-version: |
+            ${{ matrix.java.version }}
+            ${{ matris.java.toolchain && '17' || '' }}
+      - name: Set Up Gradle
+        uses: gradle/actions/setup-gradle@6cec5d49d4d6d4bb982fbed7047db31ea6d38f11 #v3.3.0
+        with:
+          cache-read-only: false
+      - name: Configure Gradle Properties
+        shell: bash
+        run: |
+          mkdir -p $HOME/.gradle
+          echo 'systemProp.user.name=spring-builds+github' >> $HOME/.gradle/gradle.properties
+          echo 'systemProp.org.gradle.internal.launcher.welcomeMessageEnabled=false' >> $HOME/.gradle/gradle.properties
+          echo 'org.gradle.daemon=false' >> $HOME/.gradle/gradle.properties
+      - name: Configure Toolchain Properties
+        if: ${{ matrix.java.toolchain }}
+        shell: bash
+        run: |
+          echo toolchainVersion=${{ matrix.java.toolchain }} >> $HOME/.gradle/gradle.properties
+          echo systemProp.org.gradle.java.installations.auto-detect=false >> $HOME/.gradle/gradle.properties
+          echo systemProp.org.gradle.java.installations.auto-download=false >> $HOME/.gradle/gradle.properties
+          echo systemProp.org.gradle.java.installations.paths=${{ format('$JAVA_HOME_{0}_X64', matrix.java.version) }} >> $HOME/.gradle/gradle.properties
+      - name: Run System Tests
+        id: run-system-tests
+        shell: bash
+        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 {2}', github.ref_name, matrix.java.version) }}