Move delegator to the EE directory

Namespace#actual_limits lives in the EE directory where its delegator
should be.

app/models/project.rb

@@ -331,7 +331,7 @@ class Project < ApplicationRecord
   delegate :add_guest, :add_reporter, :add_developer, :add_maintainer, :add_role, to: :team
   delegate :add_master, to: :team # @deprecated
   delegate :group_runners_enabled, :group_runners_enabled=, :group_runners_enabled?, to: :ci_cd_settings
-  delegate :root_ancestor, :actual_limits, to: :namespace, allow_nil: true
+  delegate :root_ancestor, to: :namespace, allow_nil: true
   delegate :last_pipeline, to: :commit, allow_nil: true
   delegate :external_dashboard_url, to: :metrics_setting, allow_nil: true, prefix: true
   delegate :default_git_depth, :default_git_depth=, to: :ci_cd_settings, prefix: :ci

ee/app/models/ee/project.rb

@@ -159,6 +159,7 @@ module EE
 
       delegate :merge_pipelines_enabled, :merge_pipelines_enabled=, :merge_pipelines_enabled?, :merge_pipelines_were_disabled?, to: :ci_cd_settings
       delegate :merge_trains_enabled, :merge_trains_enabled=, :merge_trains_enabled?, to: :ci_cd_settings
+      delegate :actual_limits, to: :namespace, allow_nil: true
 
       validates :repository_size_limit,
         numericality: { only_integer: true, greater_than_or_equal_to: 0, allow_nil: true }