Add new monitoring plots

[bpalmeiro]

As suggested by Pau, new monitoring plots may be added, as they are already computed. So, @mmkekic, @ausonandres, and I agreed to proceed the following way:

• Add plotting scripts already in use and convert them to functions in a new module in the map_builder folder.
• Add calls to this new functions and make sure code is adapted to this
• Get rid of the hist file nowadays is produced as it is only meant for monitoring purposes. This way, the plots stored in the folder will be created and stored anywhere else as convened by the script uploading them into the monitoring webpage.
• Add tests
  If no complaint, we will start a PR in order to make this happen. We are open to any suggestions about new plots or proceedings.