Add coalescence-based deuteron production generator (#2535)

* "Update Pythia8 config for 136 TeV"

* Fix file path for GeneratorLF_Coalescence_pp1360TeV.ini

* Update script to use new coalescence generator

* Specified test script

Author: Cristian-Moscatelli

MC/config/PWGLF/ini/GeneratorLF_Coalescence_pp1360TeV.ini

@@ -0,0 +1,7 @@
+#---> GeneratorLF_Coalescence_pp536TeV
+[GeneratorExternal]
+fileName = ${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_coalescence.C
+funcName = generateCoalescence({1000010020, 1000010030, 1000020030}, 1, 0.239)
+
+[GeneratorPythia8]
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg

MC/run/PWGLF/run_coalescence_deuteron_pp_1360TeV.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+#
+# A example workflow MC->RECO->AOD for a simple pp min bias
+# production, with the LF coalescence generator (GeneratorLF_Coalescence_pp1360TeV.ini)
+
+# make sure O2DPG + O2 is loaded
+[ ! "${O2DPG_ROOT}" ] && echo "Error: This needs O2DPG loaded" && exit 1
+[ ! "${O2_ROOT}" ] && echo "Error: This needs O2 loaded" && exit 1
+
+
+# ----------- START ACTUAL JOB  -----------------------------
+
+NWORKERS=${NWORKERS:-8}
+MODULES="--skipModules ZDC"
+SIMENGINE=${SIMENGINE:-TGeant4}
+NSIGEVENTS=${NSIGEVENTS:-1}
+NTIMEFRAMES=${NTIMEFRAMES:-1}
+INTRATE=${INTRATE:-500000}
+SYSTEM=${SYSTEM:-pp}
+ENERGY=${ENERGY:-13600}
+[[ ${SPLITID} != "" ]] && SEED="-seed ${SPLITID}" || SEED=""
+
+# create workflow
+${O2DPG_ROOT}/MC/bin/o2dpg_sim_workflow.py -eCM ${ENERGY} -col ${SYSTEM} -gen external -j ${NWORKERS} -ns ${NSIGEVENTS} -tf ${NTIMEFRAMES} -interactionRate ${INTRATE} -confKey "Diamond.width[0]=0.005;Diamond.width[1]=0.005;Diamond.width[2]=6." -e ${SIMENGINE} ${SEED} \
+        -ini $O2DPG_ROOT/MC/config/PWGLF/ini/GeneratorLF_Coalescence_pp1360TeV.ini
+
+# run workflow
+${O2DPG_ROOT}/MC/bin/o2_dpg_workflow_runner.py -f workflow.json -tt aod --cpu-limit 32