add support Lease-based leader election (rather than ConfigMaps) #1877
Description
What is the feature and why do you need it:
Currently, the K8S Python API only supports leader election using ConfigMapLock.
The K8S Go API supports using the proper Lease resource type with its LeaseLock, and actually recently removed support for the legacy ConfigMap approach.
We should update the Kubernetes Python API to provide a Lease-based leader election.
/cc @Invictus17 @tdihp