Stack for Sim10 Gauss release with new features for Run3

This is for the released of Gauss v56r7 Sim10 to be used for 2023 and 2024 MC productions. Should also be used for Run2

Release checklist (to be filled by the shifter)

• release build validation (to be checked with the MR author)
• RPMs deployment
• CVMFS installation
• web pages update