Merge branch 'wlee-cluster-docs' into 'master'

Update project cluster docs

See merge request gitlab-org/gitlab!35470

doc/user/project/clusters/add_remove_clusters.md

@@ -13,6 +13,11 @@ GitLab offers integrated cluster creation for the following Kubernetes providers
 
 GitLab can also integrate with any standard Kubernetes provider, either on-premise or hosted.
 
+NOTE: **Scalable app deployment with GitLab and Google Cloud Platform**
+[Watch the webcast](https://about.gitlab.com/webcast/scalable-app-deploy/) and
+learn how to spin up a Kubernetes cluster managed by Google Cloud Platform (GCP)
+in a few clicks.
+
 TIP: **Tip:**
 Every new Google Cloud Platform (GCP) account receives [$300 in credit upon sign up](https://console.cloud.google.com/freetrial),
 and in partnership with Google, GitLab is able to offer an additional $200 for new GCP accounts to get started with GitLab's

doc/user/project/integrations/prometheus.md

@@ -1166,16 +1166,16 @@ For [manually configured Prometheus instances](#manual-configuration-of-promethe
 
 > [Introduced](<https://gitlab.com/gitlab-org/gitlab/-/issues/40997>) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 12.9.
 
-[Cluster Health Metrics](../clusters/index.md#monitoring-your-kubernetes-cluster-ultimate) can also be embedded in [GitLab-flavored Markdown](../../markdown.md).
+[Cluster Health Metrics](../clusters/index.md#visualizing-cluster-health-ultimate) can also be embedded in [GitLab-flavored Markdown](../../markdown.md).
 
-To embed a metric chart, include a link to that chart in the form `https://<root_url>/<project>/-/cluster/<cluster_id>?<query_params>` anywhere that GitLab-flavored Markdown is supported. To generate and copy a link to the chart, follow the instructions in the [Cluster Health Metric documentation](../clusters/index.md#monitoring-your-kubernetes-cluster-ultimate).
+To embed a metric chart, include a link to that chart in the form `https://<root_url>/<project>/-/cluster/<cluster_id>?<query_params>` anywhere that GitLab-flavored Markdown is supported. To generate and copy a link to the chart, follow the instructions in the [Cluster Health Metric documentation](../clusters/index.md#visualizing-cluster-health-ultimate).
 
 The following requirements must be met for the metric to unfurl:
 
 - The `<cluster_id>` must correspond to a real cluster.
 - Prometheus must be monitoring the cluster.
 - The user must be allowed access to the project cluster metrics.
-- The dashboards must be reporting data on the [Cluster Health Page](../clusters/index.md#monitoring-your-kubernetes-cluster-ultimate)
+- The dashboards must be reporting data on the [Cluster Health Page](../clusters/index.md#visualizing-cluster-health-ultimate)
 
  If the above requirements are met, then the metric will unfurl as seen below.