MdtDigitization - Use calibration tool by default

Hi,

as discussed in ATLASRECTS-6203, a potential reason for the low MDT efficiencies in the run IV layout could be the usage of the default drift-time relations instead of the proper ones in the calibration database. From this MR on, we use the calibration tool by default and remove the property to switch it off optionally. These developments have been made by @nkoehler. They are his last ones before moving on to other tasks outside ATLAS. Marking the end of an era @minions:

To continue the game philosopher of the day let me also mention: @goblirsc, @sroe, @npetters, @pgadow, @fsforza, @szambito, @sabidi, @gartoni, @mvanadia: