Switch from x86 to ARM build host for POWER8+ builds. (#19575) #1274

Job	Run time
Check Modified Files	44s
Generate Docker Tags	0s
Generate Docker Build Matrix	20s
Build Docker Images (amd64, linux/amd64, false, ubuntu-24.04)	8m 20s
Build Docker Images (i386, linux/386, false, ubuntu-24.04)	7m 59s
Build Docker Images (armv7l, linux/arm/v7, false, ubuntu-24.04-arm)	6m 7s
Build Docker Images (arm64, linux/arm64/v8, false, ubuntu-24.04-arm)	6m 18s
Build Docker Images (ppc64le, linux/ppc64le, true, ubuntu-24.04-arm)	14m 37s
Push Images to Docker Hub	1s
Push Images to GHCR	1s
Push Images to Quay.io	1s
Consolidate and tag images for DockerHub	1s
Consolidate and tag images for Quay.io	1s
Consolidate and tag images for GHCR	1s
Trigger subsquent workflows for newly added versions	1s
	44m 32s

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