Deprecation MR for Monitor:System Monitoring

data/deprecations/14-8-system_monitoring.yml

+- name: "GitLab self-monitoring"  # The name of the feature to be deprecated
+  announcement_milestone: "14.8"  # The milestone when this feature was first announced as deprecated.
+  announcement_date: "2022-02-22"  # 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: false  # If this deprecation is a breaking change, set this value to true
+  reporter: abellucci  # GitLab username of the person reporting the deprecation
+  body: |  # Do not modify this line, instead modify the lines below.
+    GitLab self-monitoring gives administrators of self-hosted GitLab instances the tools to monitor the health of their instances. This feature is deprecated in GitLab 14.8, but is not scheduled for removal.
+# The following items are not published on the docs page, but may be used in the future.
+  stage: Monitor  # (optional - may be required in the future) String value of the stage that the feature was created in. e.g., Growth
+  tiers:  [Core, Premium, Ultimate] # (optional - may be required in the future) An array of tiers that the feature is available in currently.  e.g., [Free, Silver, Gold, Core, Premium, Ultimate]
+  issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/348909 # (optional) This is a link to the deprecation issue in GitLab
+  documentation_url: https://docs.gitlab.com/ee/administration/monitoring/gitlab_self_monitoring_project/  # (optional) This is a link to the current documentation page
+  image_url:  # (optional) This is a link to a thumbnail image depicting the feature
+  video_url:  # (optional) Use the youtube thumbnail URL with the structure of https://img.youtube.com/vi/UNIQUEID/hqdefault.jpg

doc/update/deprecations.md

@@ -851,6 +851,10 @@ To align with this change, API calls to list external status checks will also re
 
 **Planned removal milestone: 15.0 (2022-05-22)**
 
+### GitLab self-monitoring
+
+GitLab self-monitoring gives administrators of self-hosted GitLab instances the tools to monitor the health of their instances. This feature is deprecated in GitLab 14.8, but is not scheduled for removal.
+
 ### Optional enforcement of PAT expiration
 
 WARNING: