Blacklists project_ci_cd_settings table

At the moment, this table has almost 12 millions records on GitLab.com,
given its size it should be considered blacklisted from specific
operations

db/migrate/20190416185130_add_merge_train_enabled_to_ci_cd_settings.rb

@@ -7,9 +7,13 @@ class AddMergeTrainEnabledToCiCdSettings < ActiveRecord::Migration[5.1]
 
   disable_ddl_transaction!
 
+  # rubocop:disable Migration/UpdateLargeTable
+  # rubocop:disable Migration/AddColumnWithDefault
   def up
-    add_column_with_default :project_ci_cd_settings, :merge_trains_enabled, :boolean, default: false, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
+    add_column_with_default :project_ci_cd_settings, :merge_trains_enabled, :boolean, default: false, allow_null: false
   end
+  # rubocop:enable Migration/UpdateLargeTable
+  # rubocop:enable Migration/AddColumnWithDefault
 
   def down
     remove_column :project_ci_cd_settings, :merge_trains_enabled

db/post_migrate/20191128162854_drop_project_ci_cd_settings_merge_trains_enabled.rb

@@ -12,6 +12,6 @@ class DropProjectCiCdSettingsMergeTrainsEnabled < ActiveRecord::Migration[5.2]
   end
 
   def down
-    add_column_with_default :project_ci_cd_settings, :merge_trains_enabled, :boolean, default: false, allow_null: true
+    add_column_with_default :project_ci_cd_settings, :merge_trains_enabled, :boolean, default: false, allow_null: true # rubocop:disable Migration/UpdateLargeTable
   end
 end

rubocop/cop/migration/update_large_table.rb

@@ -34,6 +34,7 @@ module RuboCop
           namespaces
           notes
           projects
+          project_ci_cd_settings
           routes
           users
         ].freeze