Minor update to the helm chart to set the [appProtocol][1] field on all
http / https ports defined in the various services created by the helm
chart:
- http and https for controller-service
- http and https for controller-service-internal
- https for controler-service-webhook
- http for default-backend-service
These are only added in kubernetes >= 1.20, which is when this feature
became stable.
[1]: https://kubernetes.io/docs/concepts/services-networking/service/#application-protocol
