Adds controller to that signs CRs with kops CA

[olemarkus]

• watches only cert-manager CRs in kube-system.
• doesn't do any particular validation of the CR, but assumes that RBAC prevents someone from creating unwanted certs
• as mentioned in office hours one could fortify things a bit by only allowing known CR names to be signed based on what addons has been added.

Still a question if we want to do solution or if we want to just provision a new CA issuer with cert-manager.

[k8s-ci-robot]

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[k8s-ci-robot]

@olemarkus: PR needs rebase.

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[k8s-ci-robot]

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

Test name	Commit	Details	Rerun command
pull-kops-verify-hashes	a5404e1	link	/test pull-kops-verify-hashes
pull-kops-e2e-k8s-containerd	a5404e1	link	/test pull-kops-e2e-k8s-containerd

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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[olemarkus]

/close

Superseded by #10545

[k8s-ci-robot]

@olemarkus: Closed this PR.

In response to this:

/close

Superseded by #10545

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