feat: add leader election candidate namespace support #390
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Summary
This PR adds support for configuring the namespace used by the leader election candidate controller.
Previously, the candidate namespace was hardcoded to
datum-system, which caused conflicts when running multiple milo instances in different namespaces (e.g., preview environments).Details
LeaderElectionConfigstruct underinfraClusterto defineCandidateNamespace.infraCluster.LeaderElection.CandidateNamespaceinstead of a fixed string.--leader-election-candidate-namespacefor configuration.LEADER_ELECTION_CANDIDATE_NAMESPACE) and argument in the controller manager deployment manifest.Closes #389