Add CNS CHS deprecation notes to docs

doc/user/application_security/policies/index.md

@@ -17,7 +17,7 @@ can access these by navigating to your project's **Security & Compliance > Polic
 
 GitLab supports the following security policies:
 
-- [Container Network Policy](#container-network-policy)
+- [Container Network Policy](#container-network-policy) (Deprecated in GitLab 14.8)
 - [Scan Execution Policy](#scan-execution-policy-schema)
 
 ## Policy management
@@ -79,7 +79,13 @@ mode to fix your policy before Rule mode is available again.
 
 ## Container Network Policy
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/32365) in GitLab 12.9.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/32365) in GitLab 12.9.
+> - [Deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476) in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477) in GitLab 15.0.
+
+WARNING:
+Container Network Policy is in its end-of-life process. It's [deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476)
+for use in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477)
+in GitLab 15.0.
 
 The **Container Network Policy** section provides packet flow metrics for
 your application's Kubernetes namespace. This section has the following

doc/user/application_security/threat_monitoring/index.md

@@ -7,7 +7,13 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Threat Monitoring **(ULTIMATE)**
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/14707) in GitLab 12.9.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/14707) in GitLab 12.9.
+> - [Deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476) in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477) in GitLab 15.0.
+
+WARNING:
+Threat Monitoring is in its end-of-life process. It's [deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476)
+for use in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477)
+in GitLab 15.0.
 
 The **Threat Monitoring** page provides alerts and metrics
 for the GitLab application runtime security features. You can access

doc/user/clusters/agent/index.md

@@ -108,6 +108,13 @@ Support for separated private manifest and configuration repositories is tracked
 
 ## Kubernetes Network Security Alerts **(ULTIMATE)**
 
+> [Deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476) in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477) in GitLab 15.0.
+
+WARNING:
+Cilium integration is in its end-of-life process. It's [deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476)
+for use in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477)
+in GitLab 15.0.
+
 The GitLab Agent also provides an integration with Cilium. This integration provides a simple way to
 generate network policy-related alerts and to surface those alerts in GitLab.
 

doc/user/clusters/agent/repository.md

@@ -314,6 +314,13 @@ See the [official Kubernetes documentation for more details](https://kubernetes.
 
 ## Surface network security alerts from cluster to GitLab **(ULTIMATE)**
 
+> [Deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476) in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477) in GitLab 15.0.
+
+WARNING:
+Cilium integration is in its end-of-life process. It's [deprecated](https://gitlab.com/groups/gitlab-org/-/epics/7476)
+for use in GitLab 14.8, and planned for [removal](https://gitlab.com/groups/gitlab-org/-/epics/7477)
+in GitLab 15.0.
+
 The GitLab Agent provides an [integration with Cilium](index.md#kubernetes-network-security-alerts).
 To integrate, add a top-level `cilium` section to your `config.yml` file. Currently, the
 only configuration option is the Hubble relay address: