Provide binary release of code generators

[pwittrock]

User story: As a user, I want a simple way to get executables for the code generators at a specific kubernetes release version.

go get gets the code generators at head, but the generators sometimes break backward compatibility. In order to get the code generators, I need to get the code at a specific release version and then manually build them. It would be simpler for some contributors if we provided them binary distributions of all of the code generators.

[munnerz]

Have you seen the new generate-groups and generate-internal-groups in the root of this repo, merged in kubernetes/kubernetes#52186?

These take care of compiling the generators for you, and you are able to version against specific versions of the code-generator repository using tags.

The generated code should really be pinned and kept in sync with kubernetes/apimachinery, which consequently usually means keeping that also in sync with kubernetes/client-go and kubernetes/api.

You can see an example of this in use here: https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-controller/hack/update-codegen.sh

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

Prevent issues from auto-closing with an /lifecycle frozen comment.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or @fejta.
/lifecycle stale

[fejta-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.

If this issue is safe to close now please do so with /close.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle rotten
/remove-lifecycle stale

[fejta-bot]

Rotten issues close after 30d of inactivity.
Reopen the issue with /reopen.
Mark the issue as fresh with /remove-lifecycle rotten.

Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/close