tls: admin.kubeconfig server trust

[deads2k]

The kube-apiserver has multiple potential serving certs with different
trust bundles. We need to include all of them in the admin.kubeconfig.

follow-up to #1232

/assign @abhinavdahiya

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[deads2k]

I updated the deprecated one.

[staebler]

Please regenerate the asset dependency graph in a separate commit.

https://github.com/openshift/installer/blob/master/docs/design/assetgeneration.md#dependency-graph

[openshift-ci-robot]

@deads2k: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/gofmt	9fddda7	link	/test gofmt
ci/prow/e2e-aws	9fddda7	link	/test e2e-aws

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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