Add `kubectl.kubernetes.io/default-logs-container` annotation to server pods

As per https://github.com/kubernetes/kubernetes/pull/87809, set the annotation when the logging sidecar is deployed so that the user gets it as the default with a call to `kubectl logs <pod>` rather than having to specify the container as well.

It can be added as part of the pod template for existing releases by customers, this is just to do it automatically.

`kubectl.kubernetes.io/default-logs-container=logging`