Update PR workflow to use shared build action

Closes gh-42573

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

@@ -8,27 +8,11 @@ jobs:
     if: ${{ github.repository == 'spring-projects/spring-boot' }}
     runs-on: ${{ vars.UBUNTU_MEDIUM || 'ubuntu-latest' }}
     steps:
-      - name: Free Disk Space
-        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
-        with:
-          docker-images: false
-          large-packages: false
-      - name: Set Up JDK 17
-        uses: actions/setup-java@v4
-        with:
-          distribution: 'liberica'
-          java-version: '17'
-      - name: Check Out
+      - name: Check Out Code
         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
+        id: build
+        uses: ./.github/actions/build
       - name: Print JVM Thread Dumps When Cancelled
         if: cancelled()
         uses: ./.github/actions/print-jvm-thread-dumps