add doAltMask parameter (default to false) to maskPixel FE interface

this MR impelments a new doAltMask config parameter (bool) to the maskPixel function so that one can create a noiseMask which changes only the HitBus field of the pixel matrix.

The use case is to be able to mask HitOR noisy pixels while not touching the main Enable mask.

The MR also include a new scan config which aims is to mask the HitOR noisy pixels.

Finally it removes a couple of functions which were found to be useless duplicates (separate commit).

This is not tested yet, @fcrescio if you get the chance feel free to give it a try while we are sleeping in the US west coast time.

(cherry picked from commit f289d0e8)

Co-authored-by: Saclay ITk saclay.itk@cern.ch