Is your feature request related to a problem? Please describe.
The build log contains warnings from the maven-jar-plugin of kind

[WARNING] JAR will be empty - no content was marked for inclusion!

This affects QA modules that only have test sources:

• operaton-bpm-assert-qa
• qa-webapp-ce-runtime
• operaton-bpm-quarkus-engine-qa
• operaton-qa-integration-tests-engine-jakarta

Describe the solution you'd like
Disable maven-jar-plugin for the affected modules.

The build log should not contain [WARNING] JAR will be empty