Merge pull request #39619 from deads2k/fed-20-rename

Automatic merge from submit-queue (batch tested with PRs 34488, 39511, 39619, 38342, 39491)

rename kubernetes-discovery to kube-aggregator

Rename `kubernetes-discovery` to `kube-aggregator`.  Move and bulk rename.

@kubernetes/sig-api-machinery-misc

hack/lib/golang.sh

@@ -30,7 +30,7 @@ kube::golang::server_targets() {
     cmd/kubeadm
     cmd/hyperkube
     cmd/kube-discovery
-    cmd/kubernetes-discovery
+    cmd/kube-aggregator
     plugin/cmd/kube-scheduler
   )
   echo "${targets[@]}"
@@ -191,7 +191,7 @@ readonly KUBE_STATIC_LIBRARIES=(
   kube-scheduler
   kube-proxy
   kube-discovery
-  kubernetes-discovery
+  kube-aggregator
   kubeadm
   kubectl
 )