v0.24.0

This release contains the following changes

• add internetless variable to terraforming-pas to disable all internet access except to and from the Ops Manager VM
• switch from using NAT Instances to NAT Gateways
• add terraforming-control-plane
• add ops_manager_vm variable to skip deploying Ops Manager VM (by setting it to false)
• replace unnecessary wildcard DNS for PKS with DNS for the PKS API
• switch from Elastic Load Balancers (ELBs) to Network Load Balancers (NLBs)
• add missing roles that ops manager needs to create a Kubernetes cluster
• don't use Route53 if using GovCloud