Add iostore chunk hashes to the asset registry during cook.
Remove old hashing code, which was extensive. This moves the async writes in to UE::Task from the old AsyncWorkSequence().
#rb Matt.Peters
#rb Jeff.Roberts
#preflight 624b24a5f73c316f68303946
[CL 19611812 by Dan Thompson in ue5-main branch]
Added similar support to the package store manifest
Zen Store support will be added separately
Added some extra data to linker object resources to be used by the iostore package optimizer to properly support optional package chunks.
Multiple cooking outputs is used to support "optional objects" which are editor data package exports that would be put in separate iostore containers than the normal cooked game content.
#jira UE-129801
#rb Matt.Peters, CarlMagnus.Nordin
#preflight 61e5d3bb873f2ea48f48166c
#ROBOMERGE-AUTHOR: francis.hurteau
#ROBOMERGE-SOURCE: CL 18639742 in //UE5/Release-5.0/... via CL 18639751 via CL 18639758
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v900-18638592)
[CL 18639762 by francis hurteau in ue5-main branch]
This represents UE4/Main @18073326, Release-5.0 @18081140 and Dev-PerfTest @18045971
[CL 18081471 by aurel cordonnier in ue5-release-engine-test branch]
This represents UE4/Main @17911760, Release-5.0 @17915875 and Dev-PerfTest @17914035
[CL 17918595 by aurel cordonnier in ue5-release-engine-test branch]
