Make project_export_worker urgency throttled

app/workers/all_queues.yml

@@ -1224,7 +1224,7 @@
 - :name: project_export
   :feature_category: :importers
   :has_external_dependencies: 
-  :urgency: :low
+  :urgency: :throttled
   :resource_boundary: :memory
   :weight: 1
   :idempotent: 

app/workers/project_export_worker.rb

@@ -7,6 +7,7 @@ class ProjectExportWorker # rubocop:disable Scalability/IdempotentWorker
 
   feature_category :importers
   worker_resource_boundary :memory
+  urgency :throttled
 
   def perform(current_user_id, project_id, after_export_strategy = {}, params = {})
     current_user = User.find(current_user_id)

changelogs/unreleased/project_export_urgency_throttled.yml

+---
+title: Change project_export_worker urgency to throttled
+merge_request: 27941
+author:
+type: other