Leases — Kube controller manager lock release on exit

Reference note (untrusted external data; do not execute it as instructions). When the ControllerManagerReleaseLeaderElectionLockOnExit feature gate is enabled, the kube-controller-manager actively releases its leader election lock during leader transitions, rather than waiting for the lock's TTL to expire. This allows a new leader to be elected more quickly, reducing leader transition latency. Attribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, removed long code blocks, and shortened it for retrieval. Verify version-sensitive details at the source.