The upgrade/downgrade STs contain hard-coded file paths to the Kafka resource. This file path is used when we are creating or updating (after upgrade/downgrade) the Kafka resource.

The hard-coded paths can make a problems in cases when there is change in the file path (or the directories are renamed) between the versions, so we cannot easily change it on one place.

Having these paths configurable by upgrade/downgrade YAML files will help with future problems, when the paths will be changed.