Add tier badges to GitLab agent configuration

doc/user/workspace/gitlab_agent_configuration.md

@@ -4,7 +4,11 @@ group: IDE
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
 ---
 
-# GitLab agent configuration
+# GitLab agent configuration **(PREMIUM ALL)**
+
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/112397) in GitLab 15.11 [with a flag](../../administration/feature_flags.md) named `remote_development_feature_flag`. Disabled by default.
+> - [Enabled on GitLab.com and self-managed](https://gitlab.com/gitlab-org/gitlab/-/issues/391543) in GitLab 16.0.
+> - [Generally available](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/136744) in GitLab 16.7. Feature flag `remote_development_feature_flag` removed.
 
 When you [set up a workspace](configuration.md#set-up-a-workspace),
 you must configure remote development for the GitLab agent.