Allow Gitaly N+1 calls in the 'gitlab:import_export:import' task

Signed-off-by: Rémy Coutable <remy@rymai.me>

lib/tasks/gitlab/import_export/import.rake

@@ -76,15 +76,24 @@ class GitlabProjectImport
   # synchronously as part of that process.
   # This ensures that all expensive operations do not escape
   # to general Sidekiq clusters/nodes.
-  def run_isolated_sidekiq_job
+  def with_isolated_sidekiq_job
     Sidekiq::Testing.fake! do
       with_request_store do
+        ::Gitlab::GitalyClient.allow_n_plus_1_calls do
+          yield
+        end
+      end
+
+      true
+    end
+  end
+
+  def run_isolated_sidekiq_job
+    with_isolated_sidekiq_job do
       @project = create_project
 
       execute_sidekiq_job
     end
-      true
-    end
   end
 
   def create_project