Automatic merge from submit-queue
federation: Adding namespaces API
Adding namespaces API to federation-apiserver and updating the federation client to include namespaces
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Original description:
This adds the namespaces API to federation-apiserver.
The first commit is https://github.com/kubernetes/kubernetes/pull/26142.
This was removed by mistake in 9eb42f (PR #25978). Reverting some
of those changes and adding the new mechanism to autogenerate
conversions for the new types that we might define in this API
group in the future.
This drives most of the logic of deep-copy generation from tags like:
// +deepcopy-gen=package
..rather than hardcoded lists of packages. This will make it possible to
subsequently generate code ONLY for packages that need it *right now*, rather
than all of them always.
Also remove pkgs that really do not need deep-copies (no symbols used
anywhere).
