Look into deprecating the legacy `archunit-junit` public package

[schulzjo-tng]

The legacy archunit-junit package has been moved to archunit-junit4 many years ago, but the metadata do not show that in a way that the Maven Repository acknowledges this. Such a feature is supported, see e.g. https://mvnrepository.com/artifact/com.gradle/gradle-enterprise-maven-extension:

All we might need is a block in the pom.xml like so:

<distributionManagement>
  <relocation>
    <artifactId>archunit-junit4</artifactId>
  </relocation>
</distributionManagement>

see e.g. this manual and the pom.xml of the gradle-enterprise-maven-extension linked above.