Add at least 5 e2e tests for the NoRegistryCluster install feature in the MCO tests/extended folder https://github.com/openshift/machine-config-operator/tree/main/test/extended.

For more context on e2e extensions see https://github.com/openshift-eng/openshift-tests-extension

TODO: Followup discussion on exact test list, see also the already defined ones in MCO repo (see https://github.com/openshift/machine-config-operator/pull/5588

https://github.com/openshift/machine-config-operator/pull/5608 )