Address unmaintained compatibility matrix

We provide in our wiki a Compatibility Matrix for several external systems like ElasticSearch, PostgreSQL and Kafka. The page in the Wiki is outdated.

Changes in this area are mainly triggered with Major releases and require work in the Release Notes anyway. The history will build up itself and a user can look in the official docs for his version and will find the correct compatible versions he can run the application stack.

Instead of maintaining a full compatibility matrix in an external tool I would propose to create a compatibility table just for the specific released version in the official docs as part of the Release Notes.