Latest version of Assisted service build using centos:stream9.

Stream 9 uses newer nmstate-devel library. In this library there is support for vlan flags. If no flag is added, flags are assumed to be 0.
In order to support the reorder headers, we need to add the header in the nmstate configuration. Specially -> reorder-headers: true

Here is an example of such configuration:
interfaces: - name: eth1.101type: vlan state: up
ipv4: enabled: true address: - ip: 192.0.2.1 prefix-length: 24 ipv6: enabled: true address: - ip: aa:bb::cc
prefix-length: 64vlan: base-iface: eth1 reorder-headers: true id: 101