Extract EE specific files/lines for lib/api/helpers/projects_helpers.rb

We have the following files containing EE specific code. We should move them to ee/

lib/api/helpers/projects_helpers.rb

diff --git a/lib/api/helpers/projects_helpers.rb b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/lib/api/helpers/projects_helpers.rb
index e6a72b949f9..9fdaf6068e3 100644
--- a/lib/api/helpers/projects_helpers.rb
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/lib/api/helpers/projects_helpers.rb
@@ -31,8 +31,17 @@ module API
             optional :initialize_with_readme, type: Boolean, desc: "Initialize a project with a README.md"
           end
 
+          params :optional_project_params_ee do
+            optional :repository_storage, type: String, desc: 'Which storage shard the repository is on. Available only to admins'
+            optional :approvals_before_merge, type: Integer, desc: 'How many approvers should approve merge request by default'
+            optional :external_authorization_classification_label, type: String, desc: 'The classification label for the project'
+            optional :mirror, type: Boolean, desc: 'Enables pull mirroring in a project'
+            optional :mirror_trigger_builds, type: Boolean, desc: 'Pull mirroring triggers builds'
+          end
+
           params :optional_project_params do
             use :optional_project_params_ce
+            use :optional_project_params_ee
           end
         end
       end