Deprecate the start_over partial. Render the component instead

Author: jcoyne

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', silence_deprecation: true
+      end
+
+      def start_over_component
+        Blacklight::StartOverButtonComponent
+      end
     end
   end
 end

app/views/catalog/_start_over.html.erb

@@ -1 +1,2 @@
-<%= render Blacklight::StartOverButtonComponent.new %>
+<% Blacklight.deprecation.warn('The partial _start_over.html.erb will be removed in Blacklight 9.0.') unless local_assigns[:silence_deprecation] %>
+<%= render start_over_component.new %>