[feat] - Support for firewalling control plane #169
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What type of PR is this?
/kind feature
What this PR does / why we need it:
This adds a new LinodeFirewall CRD (w/o a reconciler for now) for Cloud Firewall support. If a LinodeCluster has a Control Plane Firewall ID set, the control plane node IPs and the control plane endpoint (e.g. NB) IP will be added to it.
The LinodeCluster reconciler doesn't create LinodeFirewall k8s resources, instead it creates/updates/deletes a Cloud Firewall for the control plane based on the ControlPlaneFirewallSpec.
We might later want to add a controller to reconcile LinodeFirewall resources so additional Cloud Firewalls can be created by CAPL that can apply to Linodes and/or NBs (e.g. https://github.com/linode/cluster-api-provider-linode/tree/firewall-controller)
Which issue(s) this PR fixes (optional, in
fixes #<issue number>(, fixes #<issue_number>, ...)
format, will close the issue(s) when PR gets merged):Fixes #
Special notes for your reviewer:
TODOs: