Move kubeadm to this repository

[neolit123]

k/k tracking issue:

• Moving kubeadm out of k/k repository kubernetes#78534

proposal / discussion:
https://docs.google.com/document/d/1xFAGAjfPQZrcqmapTwpJR5aUA7-2ku1asVeq3dBrjnQ/edit?usp=sharing

KEP WIP:

• kubeadm: add KEP for moving kubeadm out of k/k enhancements#1425
  k/e issue:
• Move kubeadm out of kubernetes/kubernetes enhancements#1424
  k/website updates needed:
• Use new upstream for generating reference doc for kubeadm  kubernetes-sigs/reference-docs#119

relevant read:
Versioning and releasing components outside of kubernetes/kubernetes
https://docs.google.com/presentation/d/1Utf8NgLZTrS8FmVoU6dZN3siewjGOwvTmFcsJ6vgQLI/edit

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list of action items:
TODO

[RA489]

Any help required with this effort?

[neolit123]

yes, once we resolve the discussions in the linked document.

[SataQiu]

/cc
I'd like to help.

[neolit123]

i will create a KEP based on the discussions in the google doc linked in the OP.