Remove the start_over partial. Render the component instead

Just render the component directly. See #3327 for deprecation in 8.x branch

app/components/blacklight/search_context/server_applied_params_component.html.erb

@@ -1,4 +1,4 @@
 <div id="appliedParams" class="clearfix constraints-container">
-  <%= render 'start_over' %>
+  <%= start_over %>
   <%= link_back_to_catalog class: 'btn btn-outline-secondary' %>
 </div>

app/components/blacklight/search_context/server_applied_params_component.rb

@@ -8,6 +8,14 @@ class ServerAppliedParamsComponent < Blacklight::Component
       def render?
         current_search_session
       end
+
+      def start_over
+        render start_over_component.new
+      end
+
+      def start_over_component
+        Blacklight::StartOverButtonComponent
+      end
     end
   end
 end