Feature Request: Bootstrap a new cluster

[GarySmith]

As a user I want to be able to use the UI to bootstrap a new cluster. This will use the airshipctl functionality to perform the various airshipctl bootstrap subcommands including

• generating the base configuration
• generating the bootstrap ISO
• bootstrapping the ephemeral node

This issue was migrated from AIR-224

[GarySmith]

Several hurdles have to be resolved to make this happen

• feedback/status . Operations that are performed _after _the cluster is run can update status fields in some CRD, so that a user can monitor status by fetching that CRD. But when bootstrapping, there is no cluster, and hence no CRD to update. So some other mechanism needs to be created for this.
• no k8s. Octant requires a connection to k8s to even start up, so it will have to be runnable without one (related to Allow Octant to start without a kubeconfig. vmware-archive/octant#362)
• plugin user interaction. The user interface for plugins is currently quite restrictive and does not permit plugins to perform arbitrary interaction with the user like displaying forms and buttons and so forth, which will be needed in order for a user to be able to supply information for bootstrapping and step through its phases (Consider allowing plugins to add actions to components. vmware-archive/octant#421)