Prepare new global tag for Upgrade

This is to define what need to be picked up for a new global tag to be deployed for productions for upgrade studies.

Note that some MR are coupled to MR in DDDB and will be required to be deployed in a synchronised global tag, described in DDDB#6 (closed)
Other MR may require MR in Boole or Gauss to become active.

The next tag should include

• !112 (merged), Ecal gains: studies performed and reported at Simulation meeting of 22 Sep 2020 (on hold to clarify MC calibration due to change of G4 version (may split if needed)
• !113 (merged), VP calibration default values (to be used with lhcb/Boole!271 (merged))
• !115 (merged), RICH PMTs readout maps (needs DDDB!60 (merged))
• !116 (merged), update RICH simulation input (needs DDDB!61 (merged))
• !117 (merged), RICH SIN and Claro properties (needs DDDB!61 (merged), to be used by lhcb/Gauss!646 (merged), needs lhcb/LHCb!2806 (merged) and lhcb/Boole!309 (merged))
• !118 (merged), new readout maps for UT