Add a value to disable the clusterrolebinding

[tboerger]

TL;DR

I'm using the helm chart for the deployment within a management cluster outside of the cluster which should be managed by the cloud-controllermanager. There should be an option to disable the clusterrolebinding and maybe even an option to prevent the hostNetwork but setting the HCLOUD_NETWORK and HCLOUD_NETWORK_DISABLE_ATTACHED_CHECK. For the latter I can workaround, the ClusterRoleBinding is a more important feature.

Expected behavior

Disable ClusterRoleBinding for out-of-cluster usage.