Shorten the Discovery Server Status Mirror

[tunahanertekin]

What would you like to be added?

Fleet currently mirrors the discovery server status to it's status, such as the manifest below:

status:
  discoveryServerStatus:
    created: true
    status:
      configMapStatus:
        created: true
      connectionInfo:
        configMapName: my-fleet-discovery
        ip: 10.10.1.14
      phase: Ready
      podStatus:
        created: true
        ip: 10.10.1.14
        phase: Running
      serviceExportStatus:
        created: true
      serviceStatus:
        created: true

With use of federation (in hybrid fleets), resource status gets too long and complicated. Fleet should only mirror the field status.phase and an explanatory field like status.reason or status.message of DiscoveryServer.

Why is this needed?

It's needed to make fleet status readable. Users can gather more detailed information about discovery server from the resource (DiscoveryServer) itself.