Build example recipes in GitHub Actions #579

Job	Run time
test (debos-arch)	1m 12s
Check DockerHub secrets exist	1s
test (debos-bookworm)	52s
test (debos-bullseye)	43s
test (debos-trixie)	58s
Build Docker container	6m 15s
Example recipe ospack-debian	40s
Run unit tests	2m 19s
recipes on nofakemachine	43s
escaping on nofakemachine	44s
debian (amd64) on nofakemachine	1m 25s
debian (arm64) on nofakemachine	3m 5s
debian (armhf) on nofakemachine	2m 25s
recipes on qemu	56s
escaping on qemu	1m 6s
debian (amd64) on qemu	5m 30s
debian (arm64) on qemu	32m 19s
debian (armhf) on qemu	36m 5s
recipes on uml	1m 5s
escaping on uml	51s
debian (amd64) on uml	4m 59s
debian (arm64) on uml	10m 27s
debian (armhf) on uml	18m 1s
arch on arch	9m 11s
partitioning on qemu	59s
apertis on uml	7m 13s
partitioning on uml	58s
allgreen	5s
Publish to DockerHub	0s
Publish to GHCR	0s
	2h 31m 7s

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