Merge branch 'kbychu-master-patch-88916' into 'master'

Move metrics removal to 16.0

See merge request gitlab-org/gitlab!84019

data/deprecations/15-0-deprecate-monitor-metrics.yml

 - name: "Monitor performance metrics through Prometheus"  # The name of the feature to be deprecated
   announcement_milestone: "14.7"  # The milestone when this feature was first announced as deprecated.
   announcement_date: "2022-01-22"  # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
-  removal_milestone: "15.0"  # The milestone when this feature is planned to be removed
-  removal_date: "2022-05-22"  # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
+  removal_milestone: "16.0"  # The milestone when this feature is planned to be removed
+  removal_date: "2023-05-22"  # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
   breaking_change: true  # If this deprecation is a breaking change, set this value to true
   body: |  # Do not modify this line, instead modify the lines below.
      By displaying data stored in a Prometheus instance, GitLab allows users to view performance metrics. GitLab also displays visualizations of these metrics in dashboards. The user can connect to a previously-configured external Prometheus instance, or set up Prometheus as a GitLab Managed App.

doc/update/deprecations.md

@@ -994,7 +994,7 @@ The logging features in GitLab allow users to install the ELK stack (Elasticsear
 ### Monitor performance metrics through Prometheus
 
 WARNING:
-This feature will be changed or removed in 15.0
+This feature will be changed or removed in 16.0
 as a [breaking change](https://docs.gitlab.com/ee/development/contributing/#breaking-changes).
 Before updating GitLab, review the details carefully to determine if you need to make any
 changes to your code, settings, or workflow.
@@ -1002,7 +1002,7 @@ changes to your code, settings, or workflow.
 By displaying data stored in a Prometheus instance, GitLab allows users to view performance metrics. GitLab also displays visualizations of these metrics in dashboards. The user can connect to a previously-configured external Prometheus instance, or set up Prometheus as a GitLab Managed App.
 However, since certificate-based integration with Kubernetes clusters is deprecated in GitLab, the metrics functionality in GitLab that relies on Prometheus is also deprecated. This includes the metrics visualizations in dashboards. GitLab is working to develop a single user experience based on [Opstrace](https://about.gitlab.com/press/releases/2021-12-14-gitlab-acquires-opstrace-to-expand-its-devops-platform-with-open-source-observability-solution.html). An [issue exists](https://gitlab.com/groups/gitlab-org/-/epics/6976) for you to follow work on the Opstrace integration.
 
-**Planned removal milestone: 15.0 (2022-05-22)**
+**Planned removal milestone: 16.0 (2023-05-22)**
 
 ### Pseudonymizer