PyUtils: Make checkxAOD functional on RNTuple objects
Tools/PyUtils/python/PoolFile.py: use RNTuple API to compute on disk and in memory size of objects, in class PoolRecord, introduce typeName attribute for C++ type name of the column (branch for TTree, field for RNTuple), set it systematically in __processFile method of class PoolFile, make use of default names of APR file storage elements Tools/PyUtils/bin/checkxAOD.py: make use of C++ type names set by PoolFile.py, optimise
Related to ATEAM-960