ImagePartitionAction: retry losetup.Attach() #877

Job	Run time
Check DockerHub secrets exist	1s
test (arch)	1m 2s
test (bookworm)	50s
test (trixie)	55s
Build Docker container	23m 50s
Run unit tests	2m 3s
recipes on nofakemachine	52s
templating on nofakemachine	35s
debian (amd64) on nofakemachine	1m 4s
recipes on qemu	46s
templating on qemu	1m 2s
partitioning on qemu	1m 0s
msdos partitioning on qemu	56s
debian (amd64) on qemu	7m 9s
recipes on uml	1m 0s
templating on uml	43s
partitioning on uml	1m 15s
msdos partitioning on uml	57s
debian (amd64) on uml	4m 57s
recipes on kvm	35s
templating on kvm	32s
partitioning on kvm	48s
msdos partitioning on kvm	36s
debian (amd64) on kvm	1m 10s
debian (arm64) on kvm	2m 11s
debian (armhf) on kvm	2m 7s
arch on kvm	1m 29s
apertis on kvm	2m 5s
allgreen	1s
Publish to GHCR	0s
Publish to DockerHub	0s
	1h 2m 31s

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