Bumps s390x VM to RHEL 8.8 #599

Job	Run time
should-run	1s
init / common-variables	3m 0s
init / downstream-check	0s
build-collector-slim (amd64)	13s
build-collector-slim (s390x)	14s
build-collector-slim (ppc64le)	22s
sync-drivers-and-support-packages / sync-drivers (x86_64)	1m 9s
sync-drivers-and-support-packages / sync-drivers (s390x)	52s
sync-drivers-and-support-packages / sync-drivers (ppc64le)	49s
sync-drivers-and-support-packages / update-index	1m 51s
sync-drivers-and-support-packages / copy-to-merged-bucket	27s
check-drivers-failures / check-failures	13s
build-collector-full / build-collector-full (amd64)	1m 18s
build-collector-full / build-collector-full (ppc64le)	1m 25s
build-collector-full / build-collector-full (s390x)	1m 20s
build-collector-full / retag-collector-slim	0s
build-collector-full / multiarch-manifests	13s
build-collector-full / retag-collector-full	0s
multiarch-integration-tests (rhel-s390x) / run	1m 13s
integration-tests (rhel-sap) / run	1m 27s
integration-tests (rhel) / run	1m 43s
notify	0s
	17m 50s

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