Stop using argument in perform_async

After providing the default value to deprecate the Sidekiq argument
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40381

We can now stop using the argument in perform_async.

app/controllers/concerns/integrations_actions.rb

@@ -20,7 +20,7 @@ module IntegrationsActions
     respond_to do |format|
       format.html do
         if saved
-          PropagateIntegrationWorker.perform_async(integration.id, false)
+          PropagateIntegrationWorker.perform_async(integration.id)
           redirect_to scoped_edit_integration_path(integration), notice: success_message
         else
           render 'shared/integrations/edit'

app/workers/propagate_integration_worker.rb

@@ -7,7 +7,7 @@ class PropagateIntegrationWorker
   idempotent!
   loggable_arguments 1
 
-  # Keep overwrite parameter for backwards compatibility.
+  # TODO: Keep overwrite parameter for backwards compatibility. Remove after >= 14.0
   def perform(integration_id, overwrite = nil)
     Admin::PropagateIntegrationService.propagate(Service.find(integration_id))
   end

spec/controllers/admin/integrations_controller_spec.rb

@@ -43,7 +43,7 @@ RSpec.describe Admin::IntegrationsController do
       end
 
       it 'calls to PropagateIntegrationWorker' do
-        expect(PropagateIntegrationWorker).to have_received(:perform_async).with(integration.id, false)
+        expect(PropagateIntegrationWorker).to have_received(:perform_async).with(integration.id)
       end
     end