Build arm64 image on a native arm runner #175

Job	Run time
vali / build (x86_64, ubuntu-24.04)	1m 46s
vali / build (arm64, ubuntu-24.04-arm)	2m 0s
vali-build-image / build (x86_64, ubuntu-24.04)	1m 47s
vali-build-image / build (arm64, ubuntu-24.04-arm)	2m 8s
valitail / build (x86_64, ubuntu-24.04)	2m 5s
valitail / build (arm64, ubuntu-24.04-arm)	2m 31s
vali / merge	11s
vali-build-image / merge	14s
valitail / merge	11s
	12m 53s

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