_GenerateCompileDependencyCache target should not contain the full path of ReferencePaths

Not having full paths of the RegerencePaths in the _GenerateCompileDependencyCache target will enable the remote cache scenario where one can build the code in one machine and download it to another machine so only the local changes are built and the rest is taken from the remote cache.

Start by locating the _GenerateCompileDependencyCache target and trace how ReferencePaths are incorporated into its inputs. Verify how the target's cache identity changes across machines, then confirm that unchanged outputs can be retrieved remotely while local changes still rebuild.

Written by the indexing model from the issue text.