coredns-app release v1.35.0

Added

• Support the forward max_age option (#528)

Fixed

• Render forward integer options when set to 0 (#528)
• Validate additionalZones cache, forward, kubernetes, log and loadbalance blocks against the public and cluster zone schemas (#528)

Changed

• Update coredns image to 1.15.0.
• Update gsoci.azurecr.io/giantswarm/docker-kubectl to v1.37.1 (#520)