Show cluster status to users without permissions
We currently don't show the `Cluster` option in the navigation for users without Master permissions.
This proposal lets those users see some basic information in the page:
- Users without permissions can only see cluster integration status and the cluster's name.
- If cluster integration is not set up for the project or it's not a GKE cluster, the cluster name field is not displayed.
- In all cases the HTML element for the switch is disabled and cannot be interacted with.
| Integration not set up | Disabled Manual | Disabled GKE | Enabled Manual | Enabled GKE |
|------------------------|-----------------|--------------|----------------|-------------|
|  |  |
cc @bikebilly @ayufan @filipa @dosuken123
issue