API Server frontend LB port should not change backend port

[devigned]

/kind feature

The LB exposed port for the API Server should be configurable on its own without affecting the backend port the LB directs traffic to in the backend pool. For example, the LB for API Server is exposed on 443, but the backend pool is serving traffic on 6443.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]
See kubernetes-sigs/cluster-api#5517 (comment)

[CecileRobertMichon]

prior work: #1207

[CecileRobertMichon]

we should also take a look at work done in the CAPA provider to use the KCP port: kubernetes-sigs/cluster-api-provider-aws#3063

EDIT: I take that back, I don't think that PR is taking the right approach. Added a comment.

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/lifecycle stale

[shysank]

/remove-lifecycle stale

[k8s-triage-robot]

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/lifecycle stale

[jackfrancis]

/remove-lifecycle stale

[CecileRobertMichon]

/help

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@CecileRobertMichon:
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[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
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/lifecycle stale

[CecileRobertMichon]

/remove-lifecycle stale

[xiujuanx]

I would like to help on this issue.
/assign xiujuanx