Use steam runtime to execute proton-wine

[admalledd]

proton wine is built against the steam runtime and a number of issues with winetricks/wineserver/winebus etc arise if they are ran on a system with incomplete, or mismatching library versions. For example, steam-runtime and thus proton-wine-3.16 is built against libpng-12 while ubuntu 18.04 has libpng-16.

My execution looked like this to get the whole of protontricks into the runtime:

$HOME/.steam/ubuntu12_32/steam-runtime/run.sh protontricks 359320

[user23498723452]

This issue is still impacting the new repo fork of protontricks. Will report issue there. Assuming they aren't working from the bugs shown here.

Impacted playing Snow (ValveSoftware/Proton#2279)

My command to run protontricks on Ubuntu 18.04:

$HOME/.steam/steam/ubuntu12_32/steam-runtime/run.sh protontricks 244930