Uses in kubernetes with no clusterwide actions available

[allamand]

Hello,

I would like to be able to install multicluster-service-account within a mutualized k8s cluster where I have only rights on my namespace and not cluster wide.

We should have option to separate installations and have lower requirements: using Roles instead of ClusterRole.

We should also have the hability to install the webhook in separate part has it will need higher cluster priority (installed by an admin).

Thanks