Remove hard-wired logging configuration

Instead please use a config file to control the logging. Create a
QtProject/qtlogging.ini file.

The QtProject/qtlogging.ini file is looked up in all directories
returned by QStandardPaths::GenericConfigLocation, e.g.

on Mac OS X: ~/Library/Preferences
on Unix:     ~/.config, /etc/xdg
on Windows:  %LOCALAPPDATA%, %ProgramData%,
             QCoreApplication::applicationDirPath(),
			 QCoreApplication::applicationDirPath() + "/data"

To disable all logging use the following example then tweak as desired:

[Rules]
Qt3D.Core.Nodes=false
Qt3D.Core.Aspects=false
Qt3D.Core.Resources=false
Qt3D.Core.ChangeArbiter=false
Qt3D.Render.Backend=false
Qt3D.Render.Frontend=false
Qt3D.Render.IO=false
Qt3D.Render.Jobs=false
Qt3D.Render.Framegraph=false
Qt3D.Render.RenderNodes=false
Qt3D.Render.Rendering=false
Qt3D.Render.Memory=false

Change-Id: I47a25c1a90d189dd671ed62d3f417ee7292af9f6
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>