Operators: Turn examples into documentation

[fhennig]

We have the example directories in the operators, which are very useful for us devs to quicky deploy an instance of something. But the examples are not tested.

With the getting started guide we started moving examples into the docs and testing them. It would make sense to keep doing this, with the other examples as well. There are specific examples which deploy an instance + OPA etc., which we could turn into specific docs guides.

This would be an epic and needs to be done for all operators.