Add packages nav to group sidebar

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/layouts/nav/sidebar/_group.html.haml

@@ -45,7 +45,6 @@
                     = _('Contribution Analytics')
 
             = render_if_exists 'layouts/nav/group_insights_link'
-            = render_if_exists 'groups/sidebar/dependency_proxy' # EE-specific
 
       = render_if_exists "layouts/nav/ee/epic_link", group: @group
 
@@ -119,6 +118,8 @@
                 %strong.fly-out-top-item-name
                   = _('Kubernetes')
 
+      = render_if_exists 'groups/sidebar/packages' # EE-specific
+
       - if group_sidebar_link?(:group_members)
         = nav_link(path: 'group_members#index') do
           = link_to group_group_members_path(@group) do