Authorize access to cycle analytics.

All users with "Reporter" access (and above) to a project can see the
Cycle Analytics page.

app/controllers/projects/cycle_analytics_controller.rb

@@ -1,4 +1,6 @@
 class Projects::CycleAnalyticsController < Projects::ApplicationController
+  before_action :authorize_read_cycle_analytics!
+
   def show
     @cycle_analytics = CycleAnalytics.new(@project, from: parse_start_date)
   end

app/models/ability.rb

@@ -265,7 +265,8 @@ class Ability
         :read_container_image,
         :read_pipeline,
         :read_environment,
-        :read_deployment
+        :read_deployment,
+        :read_cycle_analytics
       ]
     end