Ansible: add leader election flags, use lease-based election #3457
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Description of the change:
Ansible operator: add leader election flags, use controller-runtime leader election
Motivation for the change:
In general, the controller-runtime leader election method (lease-based) is preferable for most use cases. In the future, if there is a use case to support leader-for-life, we can add another flag to let operator developers choose their leader election mechanism.
Checklist
If the pull request includes user-facing changes, extra documentation is required:
changelog/fragments(seechangelog/fragments/00-template.yaml)website/content/en/docs