project: don't use deprecated assignRoleToSecurityGroup

We don't even use the new updateLocalRolesOnSecurityGroups instead,
because roles are supposed to be applied by an interaction workflow.
4 jobs for fix/assignRoleToSecurityGroup in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner2

01:51:32

failed ERP5.UnitTest-TestRunner2

04:20:27

passed ERP5.CodingStyleTest-TestRunner2

02:36:18

failed ERP5.UnitTest-TestRunner2

04:01:44