Draft: Fix setup for lxplus
Lxplus is migrating to Alma Linux 9, but the CMSSW version we need isn't compiled for this OS. When the user is on lxplus, start an Apptainer container for them and set it up with CMake.
Lxplus is migrating to Alma Linux 9, but the CMSSW version we need isn't compiled for this OS. When the user is on lxplus, start an Apptainer container for them and set it up with CMake.