fix: migrate from JUGGLER_DETECTOR to simply DETECTOR

.gitlab-ci.yml

README.md

benchmarks/b0_tracker/forward_protons.sh

benchmarks/barrel_ecal/run_emcal_barrel_electrons.sh

benchmarks/barrel_ecal/run_emcal_barrel_particles.sh

benchmarks/barrel_ecal/run_emcal_barrel_pi0.sh

benchmarks/barrel_ecal/run_emcal_barrel_pion_rejection.sh

benchmarks/barrel_ecal/run_emcal_barrel_pions.sh

...barrel_ecal/scripts/emcal_barrel_energy_scan_analysis.cxx

...s/barrel_ecal/scripts/emcal_barrel_particles_analysis.cxx

...rel_ecal/scripts/emcal_barrel_pion_rejection_analysis.cxx

benchmarks/barrel_hcal/run_hcal_barrel_particles.sh

benchmarks/crystal_calorimeter/config.yml

benchmarks/material_maps/config.yml

benchmarks/others/config.yml

benchmarks/pid/config.yml

benchmarks/roman_pots/roman_pot_simu.sh

benchmarks/timing/run_timing.sh

benchmarks/tracking_detectors/analysis/sim_track_hits.cxx

benchmarks/tracking_detectors/track_hits.sh