ATR-25417 Simplify unconvtrk trigger names

• rename UTT chains:

  • unconvtrk_hitdv -> hitdvjet
  • unconvtrk_distrk -> distrk
  • unconvtrk_dedx -> dedxtrk
  • unconvtrk_isohpttrack -> isotrk
  • unconvtrk_dispj -> dispjet
  • unconvtrk0_fsvsi -> fsvsi0
  • unconvtrk0_fslrt -> fslrt

• introduce list of trigTypes to support renaming

• implement initial attempt to use threshold and multiplicity in dispjet code

• update references

• clean up:

  • remove trigTypes from default SignatureDicts
  • remove unused code from UTT
  • rename some DJ functions to make them more meaningful