Merge pull request #35594 from madhusudancs/federation-kubefed-init-00

Automatic merge from submit-queue

[Federation][init] Implement `kubefed init` command that performs federation control plane bootstrap.

Please review only the last commit here. This is based on PR #35593 which will be reviewed independently.

I am intentionally not including the unit tests in this PR to better distribute and parallelize reviews. This PR is already big.

I will add a release note separately for this entire feature, so please don't worry too much about the release note here in the PR.

Design Doc: PR #34484

cc @kubernetes/sig-cluster-federation @quinton-hoole @nikhiljindal

hack/verify-flags/known-flags.txt

@@ -135,6 +135,7 @@ dns-bind-address
 dns-port
 dns-provider
 dns-provider-config
+dns-zone-name
 docker-email
 docker-endpoint
 docker-exec-handler
@@ -207,6 +208,7 @@ federated-api-burst
 federated-api-qps
 federated-kube-context
 federation-name
+federation-system-namespace
 file-check-frequency
 file-suffix
 file_content_in_loop