Provide missing advertise-address flag to kube-apiserver

[derselbst]

What type of PR is this?

/kind bug

What this PR does / why we need it:

It is already possible to override the address the kube-apiserver is running on with the kube_apiserver_address variable. This variable is already expanded in line 10, however, it wasn't expanded for the kube-apiserver config and therefore, the kube-apiserver was started without the --advertise-address flag, causing it to implicitly fall back to the --bind-address. This PR fixes this, by passing on the kube_apiserver_address to the kube-apiserver.

Which issue(s) this PR fixes:

I'm not aware of an already existing ticket.

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

Provide missing advertise-address flag to kube-apiserver

[k8s-ci-robot]

Hi @derselbst. Thanks for your PR.

I'm waiting for a kubernetes-sigs 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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[mzaian]

/ok-to-test

[mzaian]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: derselbst, mzaian

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