First version of David Lange's files
Added 2019WithGEM scenario
Added BE5DPixel10D scenario (GEN-SIM only)
Added 2017Aging and 2019Aging scenarios. Using the American spelling of ageing for consistency, as much as it pains me.
Changed the conditions from the incorrect upgradePLS3
Added Extended2023 scenario
Added cust_2023() customisation function to customise just the BE5D tracker. Added Extended2023HGCalMuon, Extended2023SHCal and Extended2023SHCal4Eta scenarios up to GEN-SIM.
Merge pull request #2530 from mark-grimes/implementFlexibleRunTheMatrix

Implement a more flexible set of runTheMatrix commands