ingressClass, electionId should be derived from helm instance name

`ingress-controller.config.kubernetes.ingressClass` and `ingress-controller.config.kubernetes.electionId` are sensitive to running multiple controllers, they should be derived from the name of the helm instance if not explicitly set.

Start by locating the Helm chart templates and values associated with ingress-controller.config.kubernetes.ingressClass and electionId. Check how the Helm instance name is exposed and how explicit values are currently handled. Done means multiple controller instances derive distinct defaults while explicitly supplied values remain unchanged.

Written by the indexing model from the issue text.