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]
RootDirectory, EngineDirectory, UnrealBuildToolPath are now found in BuildUtilities' UnrealBuild namesapce.
The way these are computed has changed. Previously, it was assumed that the application is UnrealBuildTool, and paths were constructed relative to that assembly.
Now, the assumption is that the process is located under a "Engine/Build/DotNET" sub-path and paths are constructed relative to that.
#jira none
#ROBOMERGE-SOURCE: CL 16607440 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v828-16531559)
[CL 16607455 by jonathan adamczewski in ue5-release-engine-test branch]
- Does not have the changes for new .ini file locations
#rb ben.marsh
#ROBOMERGE-SOURCE: CL 12676628 via CL 12676630 via CL 12676633
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v675-12543919)
[CL 12676637 by josh adams in Main branch]