pelux.conf: Temporarily disable DISTRO_FEATURE process-containment

[JEderonn]

Due to some issues which cannot be fixed right now:

• (BLOCKER) Qt 5.14 AS candidate results in build error ERROR: Required build target 'neptune3-ui' has no buildable providers. Missing or unbuildable dependency chain was: [ 'neptune3-ui', 'qtapplicationmanager-native', 'qtapplicationmanager-native-softwarecontainer-native']
• With Qt 5.13, Neptune3-UI cannot run applications in container (workaround is to not provide sc-config.yaml to neptune3-ui)
• Sometimes at system shutdown, the softwarecontainer-agent does not stop within maximum timeout

[JEderonn]

I am perhaps a bit worried that "why" is not obvious to someone looking in the file. But could always git blame I guess.

You mean that you would like to improve the comments in the file? I can do that.