New changes for the dst_to_dee module for September MD

This MR is aiming to reduce the large bw observed in the latest bw test.

Changes:

• Tighten the dielectron mass range
• Tighten the BDT cut
• Add HLT1 filters

TO DO:

• Apply a photon conversions veto cut in the dielectron maker (65% reduction)
  • Possibly by implementing a new functor
• Replace the photon isolation by the new method of saving the floats

Current status:

Line	BW(before) [MB/s]	BW [MB/s]
Hlt2Charm_Dst0ToD0EmEp_D0ToKmPip_OS_MVADecision	38.5	12.8
Hlt2Charm_Dst0ToD0EmEp_D0ToKmPip_SS_MVADecision	34.1	15.6