Describe KKP user and admin privileges

[csengerszabo]

We have to create a clear and appropriate table of the possible actions and privileges of a KKP user and admin somewhere over here in the docs: https://docs.kubermatic.com/kubermatic/main/architecture/role-based-access-control/

[vgramer]

Just to clarify, This ticket has to explain the difference between a KKP user and KKP admin
(basically same right as an owner on all projects and can edit Kubermatic settings
c.f. https://docs.kubermatic.com/kubermatic/main/tutorials-howtos/administration/admin-panel/)

Rework the existing RBAC to list all possible actions: something like this:

	Viewer	editor	Owner
cluster	RO	RW	RW
cluster nodes (machineDeployment)	RO	RW	RW
addons	RO	RW	RW
project's member	X	X	RW

(to be completed)

[csengerszabo]

basically same right as an owner on all projects

Unfortunately this part is currently seem not to be true, and admin privileges are said to be inconsistent. That is why we need to do an anaylsis over what actions the admins can do now exactly. And then the next step would be a proposal to make the privileges of the 2 roles consistent to this basic principle.