Update actions/checkout to v3

[kishen-v]

This PR updates workflows to use actions/checkout@v3, which will suppress multiple warnings that are raised in GitHub workflows.

Eg:

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[k8s-ci-robot]

Hi @kishen-v. Thanks for your PR.

I'm waiting for a google 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.

[iwankgb]

/ok-to-test

[iwankgb]

Blocked by #3304 (8794bc9).

[bobbypage]

/retest

[bobbypage]

please rebase with the changes in #3304, so we can re-run CI. Thanks!

[kishen-v]

please rebase with the changes in #3304, so we can re-run CI. Thanks!

@bobbypage, done!

[bobbypage]

thank you!