Migrate Kubespray to kubernetes-sigs

[ant31]

New Repo, Staging Repo, or migrate existing

As discussed with sig-cluster-lifecycle in the 28th Sept meeting we'd like to migrate https://github.com/kubernetes-incubator/kubespray to the https://github.com/kubernetes-sigs org.

Which Organization should it reside

kubernetes-sigs

If not a staging repo, who should have admin access

ant31, mattymo

If not a staging repo, who should have write access

ant31, mattymo, riverzhang, chadswen, atoms, mirwan, woopstar

What SIG and subproject does this fall under in sigs.yaml

subproject for sig-cluster-lifecycle
note: Kubespray is already listed in the sigs.yaml

Approvals

• @timothysc
• @justinsb

Additional context for request

Kubespray is today one of the most active projects by many metrics in the kubernetes/* orgs (k8s.devstats.cncf.io), it has more 300+ contributors and many users.
As the incubator org is deprecated and the project is still very active, the sig cluster-lifecycle agreed to host it in kubernetes-sigs.

/area github-repo

[timothysc]

Awesome @ant31

[timothysc]

/assign @cblecker
/approve

[justinsb]

I don't think I'm needed to approve it. If I am needed, you have my approval though!

[ant31]

@cblecker What are the next steps? All maintainers have been added the kubernetes-sig org, the repo is ready to be moved!

[timothysc]

@cblecker @spiffxp - ping!

[cblecker]

This is mostly done now.

@ant31 @timothysc -- Can you please open a PR to update sigs.yaml with the new location?