build

luks: check if keyutils are usable before running tests #132

Job	Run time
build (fedora:latest, true)	1m 20s
build (quay.io/centos/centos:stream10, true)	1m 21s
build (quay.io/centos/centos:stream9, true)	2m 21s
build (debian:testing, true)	1m 32s
build (debian:latest, true)	1m 25s
build (ubuntu:rolling, true)	1m 27s
build (ubuntu:latest, true)	1m 27s
build (quay.io/fedora/fedora:rawhide, false)	1m 21s
build (ubuntu:devel, false)	1m 33s
	13m 47s

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