Enhancement Description

• One-line enhancement description (can be used as a release note):
  Moving kubectl package code to staging
• Kubernetes Enhancement Proposal: (link to kubernetes/enhancements file, if none yet, link to PR)
  https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/kubectl-staging.md
• Primary contact (assignee): seans3, soltysh, pwittrock
• Responsible SIGs: sig-cli
• Enhancement target (which target equals to which milestone):
  There are no particular milestones to be achieved here, the end goal is to split kubectl into a separate repository but that will be outlined in separate enhancement.