[improve][ci] Skip "OWASP dependency check" when data wasn't found in cache (#23970)

Author: lhotari

.github/workflows/pulsar-ci.yaml

@@ -1494,15 +1494,21 @@ jobs:
           restore-keys: |
             owasp-dependency-check-data-
 
+      - name: Log warning when skipped
+        if: ${{ !steps.restore-owasp-dependency-check-data.outputs.cache-matched-key }}
+        run: |
+          echo "::warning::OWASP Dependency Check was skipped since the OWASP Dependency check data wasn't found in the cache. Run ci-owasp-dependency-check.yaml workflow to update the cache."
+
       # Projects dependent on flume, hdfs, and hbase currently excluded from the scan.
       - name: trigger dependency check
+        if: ${{ steps.restore-owasp-dependency-check-data.outputs.cache-matched-key }}
         run: |
           mvn -B -ntp verify -PskipDocker,skip-all,owasp-dependency-check -Dcheckstyle.skip=true -DskipTests \
             -pl '!distribution/server,!distribution/io,!distribution/offloaders,!tiered-storage/file-system,!pulsar-io/flume,!pulsar-io/hbase,!pulsar-io/hdfs3,!pulsar-io/docs,!pulsar-io/jdbc/openmldb'
 
       - name: Upload report
         uses: actions/upload-artifact@v4
-        if: ${{ cancelled() || failure() }}
+        if: ${{ steps.restore-owasp-dependency-check-data.outputs.cache-matched-key && (cancelled() || failure()) }}
         continue-on-error: true
         with:
           name: dependency report