feat(Silverblue): Add supergfxctl-gex GNOME Shell extension #550

Job	Run time
Build akmods package (37, 470)	8m 11s
Build akmods package (37, 535)	8m 54s
Build akmods package (38, 470)	6m 29s
Build akmods package (38, 535)	6m 49s
Build and push image (silverblue, 37, 470)	1m 46s
Build and push image (silverblue, 37, 535)	1m 46s
Build and push image (silverblue, 38, 470)	2m 4s
Build and push image (silverblue, 38, 535)	2m 18s
Build and push image (kinoite, 37, 470)	2m 14s
Build and push image (kinoite, 37, 535)	2m 51s
Build and push image (kinoite, 38, 470)	2m 11s
Build and push image (kinoite, 38, 535)	2m 10s
Build and push image (vauxite, 37, 470)	2m 6s
Build and push image (vauxite, 37, 535)	2m 17s
Build and push image (vauxite, 38, 470)	2m 25s
Build and push image (vauxite, 38, 535)	2m 35s
Build and push image (sericea, 38, 470)	2m 1s
Build and push image (sericea, 38, 535)	1m 58s
Build and push image (base, 37, 470)	1m 30s
Build and push image (base, 37, 535)	1m 48s
Build and push image (base, 38, 470)	1m 48s
Build and push image (base, 38, 535)	1m 44s
Build and push image (lxqt, 37, 470)	2m 9s
Build and push image (lxqt, 37, 535)	2m 1s
Build and push image (lxqt, 38, 470)	2m 7s
Build and push image (lxqt, 38, 535)	2m 6s
Build and push image (mate, 37, 470)	1m 58s
Build and push image (mate, 37, 535)	2m 28s
Build and push image (mate, 38, 470)	1m 56s
Build and push image (mate, 38, 535)	2m 3s
	1h 24m 43s

Provide feedback