fix: LEAP-1136: put data import operations on high priority queue (#5951

)

Moves `async_reimport_background` and `async_import_background` jobs to
high priority queue, since these operations are directly observable in
the UI.

label_studio/data_import/api.py

@@ -310,6 +310,7 @@ def async_import(self, request, project, preannotated_from_fields, commit_to_pro
             async_import_background,
             project_import.id,
             request.user.id,
+            queue_name='high',
             on_failure=set_import_background_failure,
             project_id=project.id,
             organization_id=request.user.active_organization.id,
@@ -438,6 +439,7 @@ def async_reimport(self, project, file_upload_ids, files_as_tasks_list, organiza
             project_reimport.id,
             organization_id,
             self.request.user,
+            queue_name='high',
             on_failure=set_reimport_background_failure,
             project_id=project.id,
         )