The script creates tickets for the back-ports, cherry-picks the latest commit of the current branch and adapts the commit messages of them to the ticket ids of the newly created tickets.
Added dedicated prepare-release profile to make sure that all modules get their versions updated on mvn release:prepare. This is required to make sure the tag lands on a commit that especially has the distribution module updated so that the documentation publication actually produces the artifacts for the released version.
Switch to consistent usage of secrets via environment variables. Remove documentation generation from standard build. Some general POM polishing. A bit of release documentation.
