Replace depreciated functions from ioutils package #744

Job	Run time
lint	24s
Test bookworm with qemu backend	2m 45s
Check if man page has been regenerated	23s
Test bookworm with uml backend	1m 17s
Test bookworm with kvm backend	1m 1s
Test trixie with qemu backend	3m 28s
Test trixie with uml backend	1m 51s
Test trixie with kvm backend	1m 13s
Test arch with qemu backend	3m 56s
Test arch with kvm backend	1m 15s
allgreen	4s
	17m 37s

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