Hide action buttons for special users

Hides the action buttons (Edit, Delete, Block, Deactivate)
for Ghost User, Alert Bot, and GitLab Support Bot.

The action buttons for these users was resulting on a 404
in the admin panel page.

app/views/admin/users/_user.html.haml

@@ -14,6 +14,7 @@
       = _('Last activity')
     .table-mobile-content
       = user.last_activity_on.nil? ? _('Never') : l(user.last_activity_on, format: :admin)
+  - unless user.internal?
     .table-section.section-20.table-button-footer
       .table-action-buttons
         = link_to _('Edit'), edit_admin_user_path(user), id: "edit_#{dom_id(user)}", class: 'btn btn-default'

changelogs/unreleased/195309-remove-special-user-action-buttons.yml

+---
+title: Hide admin user actions for ghost and bot users
+merge_request: 27162
+author:
+type: fixed