Update registry.k8s.io/kops/dns-controller Docker tag to v1.30.0

This MR contains the following updates:

Package	Type	Update	Change
registry.k8s.io/kops/dns-controller		minor	1.29.2 -> 1.30.0
registry.k8s.io/kops/dns-controller		minor	v1.29.2 -> 1.30.0
registry.k8s.io/kops/dns-controller	ironbank-docker	minor	1.29.2 -> 1.30.0
registry.k8s.io/kops/dns-controller	stage	minor	1.29.2 -> 1.30.0

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