[PWG-DQ] Add new ini file to generate single muons at fwd y

GeneratorParamSingleMuon_PbPb_536TeV.ini is a configuration file to use the external generator GeneratorParamSingleMuon_PbPb_5TeV.C

Author: sgaretti

MC/config/PWGDQ/ini/GeneratorParamSingleMuon_PbPb_536TeV.ini

@@ -0,0 +1,4 @@
+### The external generator derives from /MC/config/PWGDQ/external/generator/GeneratorParamSingleMuon_PbPb_5TeV.C
+[GeneratorExternal]
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/external/generator/GeneratorParamSingleMuon_PbPb_5TeV.C
+funcName=paramMuGen(797.446,0.830278,0.632177,10.2202,-0.000614809,-1.70993,1.87732,0.00658212,-0.0988071,-0.000452746,0.00269782,2,13,-4.,-2.3,0.3,999.,1)