replace elementary apps with Flatpaks #125

Job	Run time
image (base/base-disk-x86_64)	17m 21s
image (base/base-disk-x86_64)	31m 52s
live-iso (flagship/flagship-live)	17m 21s
live-iso (flagship/flagship-live)	41m 6s
image (base/base-disk-aarch64)	17m 19s
image (base/base-disk-aarch64)	1h 18m 36s
live-iso (gnome/gnome-live)	17m 22s
live-iso (gnome/gnome-live)	32m 1s
image (flagship/flagship-chromebook)	4m 31s
image (flagship/flagship-chromebook)	10m 25s
live-iso (kde/kde-live)	17m 22s
live-iso (kde/kde-live)	45m 16s
live-iso (pantheon/pantheon-live)	17m 21s
live-iso (pantheon/pantheon-live)	39m 22s
push-image	1s
push-image	1s
	6h 27m 17s

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