Prepare threshold settings for pPb run at 5 TeV

- Add `Hlt1BBMicroBiasVelo` and `Hlt1BBHighMult` lines
- Add "HeavyIons" GEC to all lines (it is also the default now in `Hlt1IFTLines.py`)
- Tune beam-gas settings (prescale on be/eb and looser cut on bb line)
- Adapt the VeloClosing to the low beam-beam and high beam-gas rates
  - Add and enable Hlt1VeloClosingPV (on bb crossings), looking for beam-beam PVs in the LR
  - Change standard Hlt1VeloClosingMicroBias to run only when Velo is open
  - Set VELOCLOSING routing bit only for VeloClosing lines (remove BeamGas)
- Remove the lifetime unbiased D0 lines (not needed and causing errors since L0 channels are not there)
- Add Loose GEC to Hlt1CalibMuonAlignJpsi
- Remove implicit GECs in the decoding
- Exclude Hlt1 lines unprotected by GECs from the default filter in Hlt2 lines
- Accept all bb events by the Hlt1BBSMOG lines
- (Temporarily) disable the BeamGas lines modifications for the MD TCK
- See LBHLT-56

See merge request !174