Hide admin Audit Log in sidebar when not licensed

Only show the Audit Log in the Admin sidebar when the installation has
a valid EE license to use that feature.

app/views/layouts/nav/_new_admin_sidebar.html.haml

@@ -74,10 +74,7 @@
           = link_to admin_requests_profiles_path, title: 'Requests Profiles' do
             %span
               Requests Profiles
-        = nav_link path: 'audit_logs#index' do
-          = link_to admin_audit_logs_path, title: 'Audit Log' do
-            %span
-              Audit Log
+        = render 'layouts/nav/ee/new_admin_monitoring_sidebar'
 
     = nav_link(controller: :broadcast_messages) do
       = link_to admin_broadcast_messages_path, title: 'Messages' do

ee/app/views/layouts/nav/ee/_new_admin_monitoring_sidebar.html.haml

+- if License.feature_available?(:admin_audit_log)
+  = nav_link path: 'audit_logs#index' do
+    = link_to admin_audit_logs_path, title: 'Audit Log' do
+      %span
+        Audit Log