This environment variable had an incorrect priority on the configuration
system. The expectation was higher priority than most other layers.
Now the only layer that has higher priority is the environment
variables.
I remember seeing some application last year where they closed a FEX
owned FD but now I don't remember what it was. This can really mess us
up so add some debug tracking so we can try and find it again.
Might be something specifically around flatpack, appimage, or chrome's
sandbox. I have some ideas about how to work around these problems if
they crop up but need to find the problem applications again.
Which requires moving LinuxEmulation to its own independent folder as
well. Since both IRLoader and FEXLoader rely on it.
No functional change, just moves the the code around.