e89458d398
We had two classes named `PipeTest`: one in `PipeTestUtilities.h` and one in `PipeTest.cpp`. The latter was unintentionally using the wrong class (from the header) which didn't initialize the HostInfo subsystem. This resulted in a crash due to a nullptr dereference (`g_fields`) when `PipePosix::CreateWithUniqueName` called `HostInfoBase::GetProcessTempDir`.