feat: A new field dns_endpoint is added to message `.google.cloud.d…

…eploy.v1.GkeCluster`

docs: A comment for field `internal_ip` in message `.google.cloud.deploy.v1.GkeCluster` is changed
docs: A comment for field `skaffold_version` in message `.google.cloud.deploy.v1.Release` is changed
docs: A comment for field `requested_cancellation` in message `.google.cloud.deploy.v1.OperationMetadata` is changed

PiperOrigin-RevId: 702047981

Source-Link: googleapis/googleapis@99a5e29

Source-Link: googleapis/googleapis-gen@2fdcaaf
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