Removing .NET 7 from tests, removing outdated tests and increasing timeout-minutes #588

Job	Run time
Verify tests pass (docker.io/library/alpine:latest, 6.0)	7m 34s
Verify tests pass (docker.io/library/alpine:edge, 6.0)	7m 32s
Verify tests pass (docker.io/library/alpine:edge, 8.0)	8m 48s
Verify tests pass (quay.io/centos/centos:stream8, 6.0)	9s
Verify tests pass (quay.io/centos/centos:stream8, 8.0)	8s
Verify tests pass (quay.io/centos/centos:stream9, 6.0)	6m 59s
Verify tests pass (quay.io/centos/centos:stream9, 8.0)	25s
Verify tests pass (registry.fedoraproject.org/fedora:39, 6.0)	10m 15s
Verify tests pass (registry.fedoraproject.org/fedora:39, 8.0)	5m 8s
Verify tests pass (registry.fedoraproject.org/fedora:40, 6.0)	9m 1s
Verify tests pass (registry.fedoraproject.org/fedora:40, 8.0)	5m 24s
Verify tests pass (registry.fedoraproject.org/fedora:rawhide, 6.0)	2m 17s
Verify tests pass (registry.fedoraproject.org/fedora:rawhide, 8.0)	6m 2s
Verify tests pass (registry.access.redhat.com/ubi8, 6.0)	7m 35s
Verify tests pass (registry.access.redhat.com/ubi8, 8.0)	8m 29s
Verify tests pass (registry.access.redhat.com/ubi9, 6.0)	7m 29s
Verify tests pass (registry.access.redhat.com/ubi9, 8.0)	8m 7s
	1h 41m 22s

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