[Feature] - VKE bind firewall to worker pool nodes

[samson4649]

Is your feature request related to a problem? Please describe.
Yes. VKE pool nodes deployed are not able to have firewall configuration bound to them as part of the terraform deploy process.

Describe the solution you'd like
Ideally, a definition option as part of the vultr_kubernetes_node_pools configuration which ties any nodes created in that pool to the firewall group specified.

Describe alternatives you've considered

• Manually configuring firewall groups on nodes.
• Using an operator to interact with the vultr api to update the configuration of worker nodes to define the firewall group.

[optik-aper]

That's something we'll look into after some changes to the platform firewall but isn't something we're currently going to support.