HLTEDMCreatorAlg: split view merging and gap filling config
Split the view merger and gap filler configuration into separate Cfg functions. This is in preparation for running the gap filler at Tier-0.
Changes to configuration in test_trigP1_v1PhysP1_noL1Sim_dumpConfig_build.py:
Component EDMCreatorAlg.ViewsMergingTool may differ
LateEDMKeys = ['HLTNav_Summary_OnlineSlimmed', 'HLT_RuntimeMetadata'] vs [] <<which is OK because the view merger does not look at these collection anyway.
Relates to ATR-27986.