Update clusterrole.yaml

[joekhoobyar]

Description

Fixes the use of the external-dns.alpha.kubernetes.io/ingress annotation when only istio resources are enabled as sources.

Checklist

• Unit tests updated
• End user documentation updated

[k8s-ci-robot]

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[k8s-ci-robot]

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[stevehipwell]

@joekhoobyar is there an issue to track this? I can't see external-dns.alpha.kubernetes.io/ingress in the docs and I need to see more context for why this is needed.

[stevehipwell]

FYI @joekhoobyar while this is being addressed you can use the rbac.additionalPermissions value to manually customise the cluster role.