fix: xfce live and stop pantheon builds #190

Job	Run time
live-iso (x86_64, flagship/flagship-live)	9m 27s
image (x86_64, base/base-disk)	7m 1s
live-iso (x86_64, gnome/gnome-live)	9m 27s
image (x86_64, flagship/base-disk)	9m 26s
live-iso (x86_64, kde/kde-live)	9m 25s
image (x86_64, gnome/base-disk)	8m 50s
live-iso (x86_64, xfce/xfce-live)	5m 26s
image (x86_64, flagship/base-disk)	9m 26s
image (x86_64, kde/base-disk)	4m 7s
live-iso (aarch64, flagship/flagship-live)	8m 47s
live-iso (aarch64, gnome/gnome-live)	8m 46s
image (x86_64, xfce/base-disk)	1m 59s
live-iso (aarch64, kde/kde-live)	8m 46s
live-iso (aarch64, xfce/xfce-live)	7m 56s
image (aarch64, base/base-disk)	2s
image (aarch64, flagship/base-disk)	3s
image (aarch64, gnome/base-disk)	2s
image (aarch64, flagship/base-disk)	2s
image (aarch64, kde/base-disk)	3s
image (aarch64, xfce/base-disk)	2m 57s
push-image	1s
	1h 51m 59s

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