playbook: add flock mechanism to vifib and ors playbooks

both playbooks need to run frequently on ORS which caused conflicts
4 jobs for flock (queued for 1 second)
Status Job ID Name Coverage
  External
running ERP5.StandaloneDeploymentScriptTest-Debian.Bulleseye.JEROME

21292:49:15

running ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

21292:49:23

running SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

21292:48:24

running Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

21292:49:26