operator: fix key name for delete during k8s->kvstore sync
operator: fix key name for delete during k8s->kvstore sync

The handler which synchronizes CiliumNodes from k8s to the KV store
includes the cluster name in the update operation but not the delete
operation. This might lead to nodes not being correctly deleted from the
KV store when they disappear.

Signed-off-by: Tobias Klauser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@cilium.io>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium