Missing port information in service metrics

[jonsbun]

What would you like to be added:
It would be great to have a service metric that exposes port, similar to "kube_endpoint_ports" or "kube_endpointslice_ports" metrics.

Why is this needed:
Current service metrics are not accurately reflecting one of the most important aspects of service.

Describe the solution you'd like:
Add additional metric like "kube_service_ports".

Additional context:
n/a

[k8s-ci-robot]

This issue is currently awaiting triage.

If kube-state-metrics contributors determine this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.