admin: dns: merge from the build dir
admin: dns: merge from the build dir

Try and clean this mess up where the build dir has user facing docs and move them here.

Ref: https://github.com/kubernetes/kubernetes/pull/32931

aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,erictune/erictune.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io,aidevops/kubernetes.github.io,erictune/erictune.github.io,erictune/erictune.github.io,rata/kubernetes.github.io,erictune/erictune.github.io,aidevops/kubernetes.github.io,aidevops/kubernetes.github.io,erictune/erictune.github.io,rata/kubernetes.github.io,rata/kubernetes.github.io