Harmonize GitHub Actions structure

See https://github.com/spring-projects/spring-boot/issues/42512

.github/workflows/build-pull-request.yml

@@ -0,0 +1,36 @@
+name: Build Pull Request
+on: pull_request
+permissions:
+  contents: read
+jobs:
+  build:
+    name: Build Pull Request
+    if: ${{ github.repository == 'spring-projects/spring-framework' }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - name: Set Up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'liberica'
+          java-version: '17'
+      - name: Check Out
+        uses: actions/checkout@v4
+      - name: Validate Gradle Wrapper
+        uses: gradle/actions/wrapper-validation@d156388eb19639ec20ade50009f3d199ce1e2808 # v4.1.0
+      - name: Set Up Gradle
+        uses: gradle/actions/setup-gradle@d156388eb19639ec20ade50009f3d199ce1e2808 # v4.1.0
+      - name: Build
+        env:
+          CI: 'true'
+          GRADLE_ENTERPRISE_URL: 'https://ge.spring.io'
+        run: ./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --no-parallel --continue build
+      - name: Print JVM Thread Dumps When Cancelled
+        if: cancelled()
+        uses: ./.github/actions/print-jvm-thread-dumps
+      - name: Upload Build Reports
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-reports
+          path: '**/build/reports/'