Hossein Pursultani authored Sep 08, 2022 and Mitchell Nielsen committed Sep 08, 2022

This MR adds:

* Access methods to read the current and desired version of the GitLab custom resource
* Convenient methods to work with Status subresource of GitLab custom resource
* Expose the available features that can be assessed via Adapter interface

It relocates and shortens the interface and removes redundant `GitLab` name prefix. The package name is the indicative of the the context of the interface.

Related to #429