[RM-7463] Add a new tool to logrebin spectra

Created on 2022-08-25 09:54:18 by Mira Sarkis. % Done: 80

check if it s possible to remove the dependency from client to create a dataset tool rather than a functionality or mode in the library.

Note that what is currently developed in #7088 (client and lib branches):

• new config param in config.json to activate the spectra rebinning: @'saverebinnedspectra': true@
  (https://projets.lam.fr/issues/7088#note-9)
• we can either rebin and save spectra or process them.