Consider using GNOME Disks for the manual installation using Linux

Once we ship hybrid ISOs again (#8510 (closed)), we’ll have only one remaining command line left (dd) in the manual installation using Linux. I’ve just noticed that GNOME Disks can do this job, at least on current Debian sid. Two paths seem to be available:

open GNOME Disks -> click on a USB drive -> open the menu that’s about acting on the entire drive -> Restore Disk Image
open Files -> right-click on ISO -> Open with -> Disk Image Writer -> select target device

Shall we switch to using that instead of dd?

Open questions:

do current versions of GNU/Linux distributions have a recent enough GNOME Disks that has this feature?
does this feature actually work well?
which one of the two paths would be best?

Parent Task: #8583 (closed)

Related issues

Related to #8510 (closed)

Original created by @intrigeri on 8664 (Redmine)

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