Merge branch 'selhorn-hb-5' into 'master'

Remove handbook links - Deploy - Batch 5/18

See merge request !190889



Merged-by: Zachary Painter <zpainter@gitlab.com>
Approved-by: Zachary Painter <zpainter@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>

doc/user/infrastructure/clusters/_index.md

@@ -50,7 +50,7 @@ Follow this [epic](https://gitlab.com/groups/gitlab-org/configure/-/epics/8)
 for updates.
 
 You can find technical information about why we moved away from cluster certificates into
-the GitLab agent model on the [agent's design document](https://handbook.gitlab.com/handbook/engineering/architecture/design-documents/gitlab_to_kubernetes_communication/).
+the GitLab agent model on the agent's design document.
 
 If you need more time to migrate to GitLab agent, you can [enable the feature flag](../../../administration/feature_flags.md)
 named `certificate_based_clusters`, which was [introduced in GitLab 15.0](../../../update/deprecations.md#gitlab-self-managed-certificate-based-integration-with-kubernetes).

doc/user/infrastructure/clusters/migrate_to_gitlab_agent.md

@@ -81,7 +81,7 @@ With GitLab-managed Kubernetes resources, you can:
 
 - Set up environments securely without manual intervention.
 - Control resource creation and access without giving developers administrative cluster permissions.
-- Provide self-service capabilities for [developers](https://handbook.gitlab.com/handbook/product/personas/#sasha-software-developer) when they create a new project or environment.
+- Provide self-service capabilities for developers when they create a new project or environment.
 - Allow developers to deploy testing and development versions in dedicated or shared namespaces.
 
 Prerequisites: