Deprecate and remove the storage-provisioner-gluster addon

[nixpanic]

The Gluster project has not has a release in a few years, maintenance slowed down to the point it is almost standing still. Heketi as component for deploying parts of the storage platform has been archived in 2023.

Providing the storage-provisioner-gluster addon might give users the wrong expectations. There is no guarantee Gluster is working with recent minikube versions.

Ideally the storage-provisioner-gluster addon should be deprecated and removed in the next release(s).