Restructuring benchmarks like physics_benchmarks

.gitlab-ci.yml

benchmarks/clustering/barrel_clusters.sh

benchmarks/clustering/config.yml

benchmarks/clustering/options/calorimeter_clustering.py

benchmarks/clustering/scripts/barrel_clusters.cxx

benchmarks/clustering/scripts/gen_central_electrons.cxx

benchmarks/ecal/config.yml

benchmarks/ecal/emcal_electrons.sh

benchmarks/ecal/emcal_pi0s.sh

benchmarks/ecal/options/crystal_calorimeter_reco.py

benchmarks/ecal/options/example_crystal.py

benchmarks/ecal/scripts/cal_eng_res.C

benchmarks/ecal/scripts/crystal_cal_electrons.cxx

benchmarks/ecal/scripts/emcal_electrons.cxx

benchmarks/ecal/scripts/emcal_electrons_analysis.cxx

benchmarks/ecal/scripts/emcal_electrons_reader.cxx

benchmarks/ecal/scripts/emcal_pi0.cxx

benchmarks/ecal/scripts/emcal_pi0_reader.cxx

benchmarks/ecal/scripts/makeplot.C

benchmarks/ecal/scripts/makeplot_input.C