misc fixes

Marco Clemencicrequested to merge
improve-jobs-isolation into master
  • Add --contain option to apptainer to improve isolation (see lhcb/MooreOnline#40 (comment 6919145))
  • Fix missing tests when lcg-toolchains is in the slot (see discussion on lchb-dd4hep problem at PAC on 21st July 2023)
  • Always get containers from /cvmfs/lhcb.cern.ch/containers to prepare the migration to self hosted slc6 and centos7 apptainer images (instead of using cvmfs-prod)
Edited by Marco Clemencic

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