Gateway API and TLSRoute support in Strimzi

Exposing Apache Kafka to clients running outside a Kubernetes cluster has always required some creative plumbing. Over the years, Strimzi has accumulated four external listener types ( nodeport , loadbalancer , route for OpenShift only, and ingress ), and they each come with their own trade-offs. The ingress type deserves special mention here, because it was recently deprecated and the story behind that deprecation is exactly what motivates this post.