tests: upgrade debian test to bookworm #879

Job	Run time
Check DockerHub secrets exist	1s
test (arch)	1m 8s
test (bookworm)	49s
test (trixie)	53s
Build Docker container	24m 28s
Run unit tests	2m 16s
recipes on nofakemachine	39s
templating on nofakemachine	42s
debian (amd64) on nofakemachine	1m 4s
recipes on qemu	45s
templating on qemu	49s
partitioning on qemu	56s
msdos partitioning on qemu	55s
debian (amd64) on qemu	4m 49s
recipes on uml	45s
templating on uml	39s
partitioning on uml	58s
msdos partitioning on uml	1m 19s
debian (amd64) on uml	5m 23s
recipes on kvm	1m 11s
templating on kvm	30s
partitioning on kvm	39s
msdos partitioning on kvm	37s
debian (amd64) on kvm	1m 4s
debian (arm64) on kvm	2m 37s
debian (armhf) on kvm	4m 0s
arch on kvm	1m 27s
apertis on kvm	3m 1s
allgreen	3s
Publish to GHCR	22m 29s
Publish to DockerHub	22m 43s
	1h 49m 39s

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