Rewrite instructions for Alma9
To add this here for reference based on discussion on Mattermost:
- basically I think there is some confusion concerning the installation of ROOT.
- Moreover, if you can, we should solve the problem of C++ code fomatting:
- basically right now we are using this command line to properly format all our code in one go: https://gitlab.cern.ch/cmsinnertracker/Ph2_ACF/-/blob/master/setup.sh?ref_type=heads#L165
- The problem is that this works just fine in CentOs7 with llvm-toolset-7.0 but somehow it messes up everything if we run it on Alma 9 with the current instructions