scheduled workflow: Support multi-arch #532

Job	Run time
sanity	21s
unittests	13s
focal-x64, broken, cont-on-err / build debs	4m 36s
focal-x64, broken / build debs	3m 5s
bookworm-x64, good, verbose=bloom / build debs	5m 32s
jammy-arm64, good, timeout=3 / build debs	3m 11s
jammy-x64, good / build debs	5m 2s
noble-x64, good, verbose=true / build debs	5m 52s
bookworm squash / deploy	0s
jammy push / deploy	0s
	27m 52s

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