Enrich well-known Kubernetes labels in k8sattributes processor

[smithclay]

Via the kubernetesAttributes option, map service.name and service.version to k8s well-known attributes as proposed in the semantic conventions below:

open-telemetry/semantic-conventions#349

[povilasv]

Let's wait until open-telemetry/semantic-conventions#349 is merged

[ChrsMark]

open-telemetry/semantic-conventions#236 was completed and now the ruling is part of the k8s non-normative guide at https://github.com/open-telemetry/semantic-conventions/blob/main/docs/non-normative/k8s-attributes.md. I think we can close this one.