Print thread dumps when PR build is cancelled

Closes gh-35760

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

@@ -30,3 +30,7 @@ jobs:
           CI: 'true'
           GRADLE_ENTERPRISE_URL: 'https://ge.spring.io'
         run: ./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --max-workers=4 --continue build
+
+      - name: Print JVM thread dumps when cancelled
+        uses: ./.github/actions/print-jvm-thread-dumps
+        if: cancelled()