Update of Pixel Error Monitoring to match new Error Format of PixelRodDecoder
- follows pixel raw data decoder code updates in the MRs !33946 (merged) and !36850 (merged)
- mostly adjustment to the new format of error information being stored
- also optimization of the code structure, phase out/improvement of some histograms
- and (minor) bugfixes based on validation wrt rel. 21.0