Add gcloud auth in user kubeconfig secret

[AbdullahAlShaad]

What type of PR is this?
/kind feature

What this PR does / why we need it:

This PR adds gcloud-auth authentication in the user kubeconfig secret.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #923

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• includes documentation
• adds unit tests

Release note:

Add `gcloud-auth` authentication

[k8s-ci-robot]

Hi @shaad7. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[cpanato]

/ok-to-test
/assign @richardcase

[richardcase]

@shaad7 - should we only be using this from v1.26?

[AbdullahAlShaad]

Yes. The auth changed in GKE version 1.26

[AbdullahAlShaad]

@richardcase Should I add a condition to check the GKE version and generate kubeconfig according to the version ?

[richardcase]

If it's version specific, then I think we will need to. wdyt?

[AbdullahAlShaad]

It is not version specific. The update works on all the versions and the old one does not. So, I think we are good to go with the PR.

[richardcase]

Thanks for the clarification, and sorry its taken so long to get back to you.

[richardcase]

From my side:
/approve

For lgtm:

/assign cpanato

[cpanato]

/lgtm

thanks

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, richardcase, Shaad7

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [cpanato,richardcase]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment