Draft: BnoC HTL2 Lines for July selections deadline

BnoC HLT2 and spruce lines targeting the July selections deadline will be merged here, before the collective merge into 2024-patches

Open BnoC MRs targeting this deadline:

HLT2 selections

!3482 , !2941, !3594

Update BnoC selections guidance

• !2959 (merged)
  • Remove out-dated examples in Moore/Hlt/Hlt2Conf/options/examples/bnoc
  • Update BnoC lines folder, README
  • Prepared updated guidance in https://codimd.web.cern.ch/JE62QMvlRuOJEvbnILCoCQ?view# (linked from updated README)