Read/write/decor handles for TruthNavigationDecorator
This provides R/W/D handles for the TruthNavigationDecorator tool and is a prerequisite for running DAOD building in AthenaMT. Slightly less trivial than usual due to the multiple containers that may need to be decorated, means that there are WriteDecorHandleArrays that are properties but should not be set from tbe config layer by the user.