[ci_dcn_site] Disable FQDN validation for DCN deployment

[fultonj]

Jira: https://issues.redhat.com/browse/OSPRH-27045

[openshift-ci]

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[softwarefactory-project-zuul]

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https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/a32cd038f01d4de1880f3c62931e148d

✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 19m 00s
❌ podified-multinode-edpm-deployment-crc RETRY_LIMIT in 21m 32s
✔️ cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 32m 40s
❌ cifmw-crc-podified-edpm-baremetal-minor-update FAILURE in 2h 03m 29s
✔️ cifmw-pod-zuul-files SUCCESS in 5m 15s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 30s
✔️ cifmw-pod-pre-commit SUCCESS in 8m 31s
✔️ cifmw-molecule-ci_dcn_site SUCCESS in 1m 35s