Merge branch '11041-move-ee-differences-for-app-views-search-_results-html-haml' into 'master'

Resolve EE differences in search/_results.html.haml

Closes #11041

See merge request gitlab-org/gitlab-ee!13720

app/views/search/_results.html.haml

 - if @search_objects.to_a.empty?
   = render partial: "search/results/empty"
-  = render 'shared/promotions/promote_advanced_search'
+  = render_if_exists 'shared/promotions/promote_advanced_search'
 - else
   .row-content-block
     - unless @search_objects.is_a?(Kaminari::PaginatableWithoutCount)
@@ -12,7 +12,7 @@
       - elsif @group
         - link_to_group = link_to(@group.name, @group)
         = _("in group %{link_to_group}").html_safe % { link_to_group: link_to_group }
-  = render 'shared/promotions/promote_advanced_search'
+  = render_if_exists 'shared/promotions/promote_advanced_search'
   .results.prepend-top-10
     - if @scope == 'commits'
       %ul.content-list.commit-list