New rules and configuration managment

Changed

• Cleanup jobs / retention rules are now imported on-demand based on the extensions the project uses.

Added

• Custom retention cronjob to replace CMS Version Garbage Collection.
  The ootb garbage collection mechanism is over-engineered and should be a regular cronjob.

• Retention rules and jobs for the promotion engine, based on Top 10 Recommendations for Improving the Performance of your Commerce Cloud Promotion Engine