Improve CRD display in kubectl

[hugoShaka]

This PR adds to crdegen the ability to set additional columns in the CRDs.

Changelog: The role, server and token Teleport operator CRs now display additional information when listed with kubectl get.

This allows to generate more user-friendly outputs.

Before

$ kubectl get teleportprovisiontokens
NAME      AGE
mytoken   67s

$ kubectl get teleportusers
NAME     AGE
myuser   89m

$ kubectl get teleportopensshserverv2
NAME                                   AGE
7c887939-dadf-46c5-9613-14716ab3bfe5   23s

After

$ kubectl get teleportprovisiontokens
NAME      JOIN METHOD   SYSTEM ROLES          AGE
mytoken   iam           ["Node","App","Db"]   67s

$ kubectl get teleportusers
NAME     ROLES                 AGE
myuser   ["myrole","access"]   89m

$ kubectl get teleportopensshserverv2
NAME                                   HOSTNAME                      ADDRESS          AGE
7c887939-dadf-46c5-9613-14716ab3bfe5   hugo-test-openssh-agentless   34.95.39.17:22   23s

This PR was motivated by the poor kubectl output when I wrote the IaC guide for OpenSSH servers. It only displayed a UUID and not the server hostname nor address.

Tip

The first commit contains the code change that must be reviewed (a few lines).

The second commit contains the re-generated CRDs (large diff, not interesting)

[github-actions]

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[github-actions]

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[public-teleport-github-review-bot]

@hugoShaka See the table below for backport results.

Branch	Result
branch/v15	Create PR