remove Brunel PGunRecoSeqRun2 in favor of deeper changes in Rec
Deprecate in favor of using standard $APPCONFIGOPTS/Brunel/pGun-Signal.py $APPCONFIGOPTS/Persistency/PropagatePgunVertex.py for productions.
GitLab jobs artifacts no longer stored forever as of Monday, November 4th 08:30h. Further information under https://cern.ch/otg0152576
Deprecate in favor of using standard $APPCONFIGOPTS/Brunel/pGun-Signal.py $APPCONFIGOPTS/Persistency/PropagatePgunVertex.py for productions.