Create kubectl plugin for commonly required debugging information

[philbrookes]

A plugin for kubectl to enable easier debugging of users problems, which could potentially also access the DNS Provider to retrieve extra information, and to test the provider credentials are functional and present.

kubectl dns get-zone-records:

• by host (e.g. app.pb.hcpapps.net) or DNS Record
• by dnspolicy CR - every DNS Record owned by the policy

Pull directly from provider API.

Format to use when listing records and connected owners:

zone overview:
  array of yaml output for each endpoint pulled from the zone 

kubectl dns delete-owner

• create DNS Record with owner ID
• wait for finalizer
• delete DNS Record
• wait for removal