Update debug messages based on the new method from #170425. Added a new debug type `Tool` and updated the following files. - include/OffloadPolicy.h - include/OpenMP/OMPT/Connector.h - include/Shared/Debug.h - include/Shared/EnvironmentVar.h - libomptarget/OpenMP/Mapping.cpp - libomptarget/OpenMP/OMPT/Callback.cpp - libomptarget/PluginManager.cpp