use leader election API if available

[DirectXMan12]

We should use the new leader election api when available. We can check if it's around via discovery, and then use it if available, falling back to configmaps if not

/kind feature
/priority backlog

[adohe-zz]

here leader election api means coordination.k8s.io api? @DirectXMan12

[DirectXMan12]

yeah

[mszostok]

Hi @DirectXMan12, I can provide a PR for that 🙂
but are you still interested in having that?

[mszostok]

/assign

[DirectXMan12]

yeah, still interested. Will have to coordinate with #444

[fejta-bot]

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[DirectXMan12]

/lifecycle frozen