Add RTA/2024.08.22.2

Release for HLT2 after the August MD:

• https://gitlab.cern.ch/lhcb/Moore/-/releases/v55r12p2
• https://gitlab.cern.ch/lhcb/Rec/-/releases/v36r12p1

(see also !258 (closed) that was abandoned)

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