* Move IAM migration client to cloudcmd package
* Move Terraform Cluster upgrade client to cloudcmd package
* Use hcl for creating Terraform IAM variables files
* Unify terraform upgrade code
* Rename some cloudcmd files for better clarity
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Signed-off-by: Daniel Weiße <dw@edgeless.systems>
terraform: collect apiserver cert SANs and support custom endpoint
constants: add new constants for cluster configuration and custom endpoint
cloud: support apiserver cert sans and prepare for endpoint migration on AWS
config: add customEndpoint field
bootstrapper: use per-CSP apiserver cert SANs
cli: route customEndpoint to terraform and add migration for apiserver cert SANs
bootstrapper: change interface of GetLoadBalancerEndpoint to return host and port separately