Remove old CrashReportHelper
Move files dealing with crash upload and reporting to Runtime/CrashReportCore from CrashReportClient
Addition of CrashReporter Plugin in Fortnite for use with IOS
#rb brandon.schaefer, chris.bunner
#ROBOMERGE-OWNER: ben.marsh
#ROBOMERGE-AUTHOR: peter.sauerbrei
#ROBOMERGE-SOURCE: CL 5814730 via CL 5814731 via CL 5814748 via CL 5817030 via CL 5817031
#ROBOMERGE-BOT: BUILD (Main -> Dev-Build)
[CL 5847894 by peter sauerbrei in Dev-Build branch]