Merge in bootc support #622

Job	Run time
build / image (main, aurora, 40)	6m 23s
build / image (main, aurora-dx, 40)	8m 12s
build / image (nvidia, aurora, 40)	6m 29s
build / image (nvidia, aurora-dx, 40)	10m 15s
build / image (asus, aurora, 40)	7m 20s
build / image (asus, aurora-dx, 40)	9m 39s
build / image (asus-nvidia, aurora, 40)	8m 55s
build / image (asus-nvidia, aurora-dx, 40)	9m 38s
build / image (surface, aurora, 40)	6m 31s
build / image (surface, aurora-dx, 40)	8m 37s
build / image (surface-nvidia, aurora, 40)	4m 48s
build / image (surface-nvidia, aurora-dx, 40)	4m 49s
build / Check all aurora 40 builds successful	2s
build / iso	0s
	1h 31m 38s

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