Merge branch '210535-move-prometheus-alert-serializer-to-core' into 'master'

Move PrometheusAlertSerializer to CE

Closes #210535

See merge request gitlab-org/gitlab!27430

config/routes/project.rb

@@ -339,6 +339,13 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       end
 
       namespace :prometheus do
+        resources :alerts, constraints: { id: /\d+/ }, only: [:index, :create, :show, :update, :destroy] do
+          post :notify, on: :collection
+          member do
+            get :metrics_dashboard
+          end
+        end
+
         resources :metrics, constraints: { id: %r{[^\/]+} }, only: [:index, :new, :create, :edit, :update, :destroy] do
           get :active_common, on: :collection
         end

ee/config/routes/project.rb

@@ -129,13 +129,6 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       end
 
       namespace :prometheus do
-        resources :alerts, constraints: { id: /\d+/ }, only: [:index, :create, :show, :update, :destroy] do
-          post :notify, on: :collection
-          member do
-            get :metrics_dashboard
-          end
-        end
-
         resources :metrics, constraints: { id: %r{[^\/]+} }, only: [] do
           post :validate_query, on: :collection
         end