Add RTA/2024.10.20.3 stack, patch release for 2024 pp-ref MC

Included projects:

  Gaudi: v38r1p1
  Detector: v1r36
  LHCb: v55r14p1
  Lbcom: v35r14p1
  Rec: v36r14p1
  Allen: v4r14p1
  Moore: v55r14p3

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