Do not allow deleting node resource using kubectl as it has side effects

[liptanbiswas]

Steps to reproduce:

1. Create a cluster with 2 nodes.
2. Deleted a node using kubectl.
3. Scale down the cluster.
4. See cluster is stuck in scaling in civo dashboard.

Just my 2 cents. If I am correct, nodes are managed by some Civo operator. Ideally kubectl should not be able to modify them.