Plot Histograms of Signal & MC for the signal/background discriminator for the CMS
Tested with LCG 105.
source /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-clang16-opt/setup.sh
python plot_dists.py -m serial_baseline_param \
-i /some/dir/to/cards/like/flats10_test_serial_baseline_param/flats10_qcd/ \
-o ./some/dir/for/output/plots