add missing consul dataplane partial (#18078)

website/content/partials/consul-dataplane-upgrade-note.mdx

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+### Consul Dataplane Compatibility
+If you are using Consul on Kubernetes, please be aware that upgrading to Consul 1.14.0 will impact Consul [secrets](/docs/secrets/consul), [storage](/docs/configuration/storage/consul), and [service registration](/docs/configuration/service-registration/consul). As of Consul 1.14.0, Consul on Kubernetes uses [Consul Dataplane](https://developer.hashicorp.com/consul/docs/connect/dataplane) by default instead of client agents. Vault does not currently support Consul Dataplane. Please follow the Consul 1.14.0 [upgrade guide](https://developer.hashicorp.com/consul/docs/k8s/upgrade#upgrading-to-consul-dataplane) to ensure that your Consul on Kubernetes deployment continues to use client agents.