Allow to use old-style IBL calibration with IBL geometry, for testing and validation purposes

Currently different IBL charge calibration algorithms and folders are used for run2 and run3 geometry - the parsing of the geometry version is used to decide which is used in the configuration.

This is making physics validation of the run 3 geometry difficult. This MR allows the user to force the use of the old calibration even when for run 3 geometry. Admittedly, it is unlikely we will need to use that after we are done with https://its.cern.ch/jira/browse/ATLPHYSVAL-812 tests.

The code seems to be working : in the logfile the PixelChargeCalibCondAlg is run in both digitization and reconstruction, if and only if the experimental digitization flag is set, and the ToT values are sensible.

cheers, Tommaso