feat: add new kube_service_spec_ports metric#2849

Serializator wants to merge 3 commits intokubernetes:mainkubernetes/kube-state-metrics:mainfrom

Serializator:ISSUE-2819-kube-service-port-metricSerializator/kubernetes-kube-state-metrics:ISSUE-2819-kube-service-port-metricCopy head branch name to clipboard