Add a layer of caching to avoid running msbuild as much as possible.
#jira UE-109181
#rb ben.marsh
#ROBOMERGE-SOURCE: CL 17102399 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v853-17066230)
[CL 17102408 by jonathan adamczewski in ue5-release-engine-test branch]