erp5_stripe: fix missing workflow_managed_permission in stripe_payment_session_workflow.

7 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:31:33

failed ERP5.PerformanceTest-Master

00:40:10

failed ERP5.UnitTest-Master

02:28:36

passed SlapOS.Eggs.UnitTest-Master.Python2

00:29:55

passed SlapOS.Eggs.UnitTest-Master.Python3

00:31:59

failed Wendelin.UnitTest-Master

01:27:07

failed Wendelin.UnitTest-Master

00:19:55