feat: set service ports when containerPort is set

[flpanbin]

related to #154

Populate headless Services with port definitions when the sandbox pod template declares container ports.
Deduplicate ports per protocol, default to TCP when unspecified, and reuse container port names in the Service spec.

services like:

bin % kubectl -n test-abc get svc
NAME                TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
sandbox-clusterip   ClusterIP   None         <none>        80/TCP    1s

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @flpanbin. Thanks for your PR.

I'm waiting for a github.com member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[lizzzcai]

Thanks for the quick response! The implementation looks good to me, probably can add some test cases, thanks again for the PR.

[flpanbin]

Thanks for the quick response! The implementation looks good to me, probably can add some test cases, thanks again for the PR.

Awesome, thank you for your feedback. I've added the unit tests.

[janetkuo]

/ok-to-test