Moves method to TreeHelper

Reuses existing TreeHelper instead of creating a new one just for one
method.

app/helpers/tree_helper.rb

@@ -147,4 +147,11 @@ module TreeHelper
   def relative_url_root
     Gitlab.config.gitlab.relative_url_root.presence || '/'
   end
+
+  # project and path are used on the EE version
+  def tree_content_data(logs_path, project, path)
+    {
+      "logs-path" => logs_path
+    }
+  end
 end

app/views/projects/tree/_tree_content.html.haml

-.tree-content-holder.js-tree-content{ 'data-logs-path': @logs_path }
+.tree-content-holder.js-tree-content{ data: tree_content_data(@logs_path, @project, @path) }
   .table-holder.bordered-box
     %table.table#tree-slider{ class: "table_#{@hex_path} tree-table qa-file-tree" }
       %thead