USourceControlHelpers::GetFilesInDepotAtPath is broken

The p4 files command is used to grab the list of depot files. This does not have a client path, but the parse records function called in FPerfroceGetFileListWorker::Execute (ParseRecordSetForState) expects fstat output, including a client file path. The p4 files command only returns depot paths, an assert is hit since there is no client file path. Additionally, this function does not parse the depot paths.

1. Run the function on any path with a valid perforce connection. Needs to be done in code, the function is not exposed to script

-> Expected: get a list of files back
-> Actual: get an assert