Show user WorkspaceRole in tenant administration

Description:

There should be a possibility to distinguish between people without any access and people with deleted access.

Example of enhancement:
Add column in User and show user as ADMIN/USER/NO WORKSPACE ACCESS

Benefit/impact:
Right now we can check them only in Administrator tool and they look exactly the same. This prevents us from verifying user in workspaces, where they have access, without accessing any of the model