Move package services and finders to core

Moving services and finders to core in
preparation for moving the packages
feature to core.

.rubocop_todo.yml

@@ -934,7 +934,6 @@ Rails/SaveBang:
     - 'ee/spec/services/merge_requests/remove_approval_service_spec.rb'
     - 'ee/spec/services/merge_requests/update_blocks_service_spec.rb'
     - 'ee/spec/services/merge_trains/refresh_merge_request_service_spec.rb'
-    - 'ee/spec/services/packages/conan/create_package_file_service_spec.rb'
     - 'ee/spec/services/projects/after_rename_service_spec.rb'
     - 'ee/spec/services/projects/import_export/export_service_spec.rb'
     - 'ee/spec/services/projects/update_mirror_service_spec.rb'
@@ -1411,6 +1410,7 @@ Rails/SaveBang:
     - 'spec/services/notes/create_service_spec.rb'
     - 'spec/services/notification_recipients/build_service_spec.rb'
     - 'spec/services/notification_service_spec.rb'
+    - 'spec/services/packages/conan/create_package_file_service_spec.rb'
     - 'spec/services/projects/after_rename_service_spec.rb'
     - 'spec/services/projects/autocomplete_service_spec.rb'
     - 'spec/services/projects/create_service_spec.rb'

app/policies/project_policy.rb

@@ -259,6 +259,7 @@ class ProjectPolicy < BasePolicy
     enable :read_metrics_dashboard_annotation
     enable :metrics_dashboard
     enable :read_confidential_issues
+    enable :read_package
   end
 
   # We define `:public_user_access` separately because there are cases in gitlab-ee
@@ -475,6 +476,7 @@ class ProjectPolicy < BasePolicy
   end
 
   rule { can?(:public_access) }.policy do
+    enable :read_package
     enable :read_project
     enable :read_board
     enable :read_list

ee/app/policies/ee/project_policy.rb

@@ -227,7 +227,6 @@ module ProjectPolicy
         enable :read_deploy_board
         enable :admin_issue_link
         enable :admin_epic_issue
-        enable :read_package
         enable :read_group_timelogs
       end
 
@@ -253,8 +252,6 @@ module ProjectPolicy
         enable :admin_iteration
       end
 
-      rule { can?(:public_access) }.enable :read_package
-
       rule { can?(:read_project) & iterations_available }.enable :read_iteration
 
       rule { security_dashboard_enabled & can?(:developer_access) }.policy do