[keepalived-vip] add keepalived-cloud-provider as related project

[xinau]

As the keepalived-cloud-provider is referenced in the official documentation and it uses the kube-keepalived-vip. I would like to add it as a related project.

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[xinau]

/assign @bprashanth

[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.

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

[bowei]

/lgtm /approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bowei, xinau

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