feat: allow csi controllers to use client-go's leader election label functionality

[DerekFrank]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test

/kind feature

/kind flake

What this PR does / why we need it:

This PR allows consumers of csi-lib-utils to leverage client-go's lease label functionality: kubernetes/kubernetes#131632

Which issue(s) this PR fixes:

Fixes #194

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Users can now specify custom labels that will be set on the underlying k8s lease object when a new leader is elected

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: DerekFrank
Once this PR has been reviewed and has the lgtm label, please assign jsafrane for approval. For more information see the Code Review Process.

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

Needs approval from an approver in each of these files:

• OWNERS

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

[k8s-ci-robot]

Welcome @DerekFrank!

It looks like this is your first PR to kubernetes-csi/csi-lib-utils 🎉. Please refer to our pull request process documentation to help your PR have a smooth ride to approval.

You will be prompted by a bot to use commands during the review process. Do not be afraid to follow the prompts! It is okay to experiment. Here is the bot commands documentation.

You can also check if kubernetes-csi/csi-lib-utils has its own contribution guidelines.

You may want to refer to our testing guide if you run into trouble with your tests not passing.

If you are having difficulty getting your pull request seen, please follow the recommended escalation practices. Also, for tips and tricks in the contribution process you may want to read the Kubernetes contributor cheat sheet. We want to make sure your contribution gets all the attention it needs!

Thank you, and welcome to Kubernetes. 😃

[k8s-ci-robot]

Hi @DerekFrank. Thanks for your PR.

I'm waiting for a kubernetes-csi 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-sigs/prow repository.

[AndrewSirenko]

/ok-to-test

[jsafrane]

I would probably wait for GA of 1.34. Otherwise dependabot gets crazy and too eager to update to 1.35 alpha, once it's released.

[AndrewSirenko]

Nit: Can we add a GoDoc comment to match rest of exported functions?

Perhaps something like:

// WithLabels adds labels on Lease resource when a new leader is elected