New histograms (qa::H1D, qa::H2D, qa::Prof1D, qa::Prof2D) in the online reconstruction QA

Features:

• new 1D- and 2D-histograms based on boost/histogram (with working example of 2D-histogram in the CA online QA)

This merge request introduces modifications to:

• online digi-event builder QA (replacement of Histo1D with qa::H1D)
• online tracking QA
• histogram server (added 2D histograms)
• histogram server tester (message initialization is now carried out with the qa::Data class)

@p.-a.loizeau, please, take a look on the histogram server part

Update:

• the classes qa::Prof1D and qa::Prof2D were added (the example - hit usage in different tracking stations)