Enable cluster-wide operation

[siegenthalerroger]

Is your feature request related to a problem? Please describe.

If I have grafana labs deployments in multiple namespaces I also need to deploy the rollout-operator multiple times. This is inefficient and unlike any other k8s operators that are generally employed.

Describe the solution you'd like

Having the rollout operator optionally be capable of working across all namespaces.

Describe alternatives you've considered

Deploying the operator into every namespace, this is inefficient and introduces complexity.

[pracucci]

I'm not sure we will ever do this. Binding 1 rollout-operator to 1 namespace was a specific design decision to keep it simpler and isolated from other instances.

This is inefficient

Why do you consider it inefficient? The rollout-operator is very lightweight.