[release-4.18] SDN-5566: virt, udn: primary UDN requires the net seg FG

[openshift-cherrypick-robot]

This is an automated cherry-pick of #29374

/assign jluhrsen

[openshift-ci-robot]

@openshift-cherrypick-robot: Ignoring requests to cherry-pick non-bug issues: SDN-5566

In response to this:

This is an automated cherry-pick of #29374

/assign jluhrsen

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@openshift-cherrypick-robot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/okd-scos-e2e-aws-ovn	a60b2a8	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-aws-ovn-cgroupsv2	a60b2a8	link	false	/test e2e-aws-ovn-cgroupsv2
ci/prow/e2e-aws-ovn-upgrade	a60b2a8	link	false	/test e2e-aws-ovn-upgrade
ci/prow/e2e-gcp-ovn	a60b2a8	link	true	/test e2e-gcp-ovn
ci/prow/e2e-gcp-csi	a60b2a8	link	false	/test e2e-gcp-csi
ci/prow/e2e-agnostic-ovn-cmd	a60b2a8	link	false	/test e2e-agnostic-ovn-cmd

Full PR test history. Your PR dashboard.

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