Improvements for Tracker Alignment `DiMuonValidation`

[mmusich]

PR description:

The goal of this PR is to inject in release few improvements for Tracker Alignment DiMuonValidation setup. These are:

• adding 3D histograms of di-muon mass vs η, φ for derivation of 2D bias maps: b4be42bcf8363c5e47642264f39206eaed7a25e0
• improve the titles of some of the monitoring histograms in bins of muon pseudo-rapidity: 795c78ceab3c77fa742f47251b6ecc51151ea5a6 , 682c03d6439164f9825314e1a4df4ffca23e686a
• finally, introduce a new C++ macro to perform fits of the mass bias in bins of track η, φ. This is foreseen in the longer term to replace the existing Zmumumerge.cc class which is currently used by the so-calle "all-in-one" tool. The new plotting script fixes several issues with the final plotting currently provided by the all-in-one; however, the replacement is not done in this PR and will have to be done at a second time.

PR validation:

Private validation was carried out using this branch and operating the new plotting macros. The plots at this link were obtained.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

Not a backport, will be backported to 14.0.X

Cc: @henriettepetersen @TomasKello