[Workaround] Known issue preventing electron based apps from launching in linux

[grctest]

Describe the bug

On linux there is a reoccurring issue preventing the launch of chromium in electron.

To Reproduce

Try to install and run the deb file in a fresh linux install, see it fail to launch and eventually provide a warning.

Expected behavior

The app launches.

Additional context

Known electron issue: electron/electron#42510

Temp terminal fix which worked for me: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

This fix isn't permanent, updates to linux seem to reset it, so you need to re-apply this fix occasionally on linux.