Implementation of text-based charge charge calibration for ITk pixels
This MR reads in a text file with the ITk pixel charge calibration constants to perform the digitization. The text file is produced by running a stand-alone Python code outside Athena, but it can be relatively easily integrated with the ITKPixelChargeCalibration.py code. Please find the text file attached below. To put it in context, this idea was suggested to perform tests for implementing multi-LUT-based charge calibration,which is currently not possible with the current DB due to size limitations. At the moment, the text file stores only the charge calibration constants for a single LUT, but the end goal is to store the calibration constants of ~40 LUTs