Use redirection syntax with fc, rather than errorlevel (per https://ss64.com/nt/fc.html) to work around inconsistent results.
#jira UE-121352
#rb patrick.finegan
#ROBOMERGE-SOURCE: CL 17156706 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v855-17104924)
[CL 17156711 by jonathan adamczewski in ue5-release-engine-test branch]