DEV: Move enable_user_status out of experimental category (#29949)

This setting is not experimental anymore, and hasn't been
for a while.

Docs at https://meta.discourse.org/t/user-status/240335 will
be updated.

config/site_settings.yml

@@ -816,6 +816,9 @@ users:
     client: true
   delete_associated_accounts_on_password_reset:
     default: false
+  enable_user_status:
+    client: true
+    default: false
 
 groups:
   enable_group_directory:
@@ -3352,9 +3355,6 @@ experimental:
   google_oauth2_hd_groups:
     default: false
     validator: GoogleOauth2HdGroupsValidator
-  enable_user_status:
-    client: true
-    default: false
   lazy_load_categories_groups:
     default: ""
     type: group_list