networkd units not supported in ign-converter

[pothos]

Description

There was a bug report on Matrix that networkd units in a v2 config didn't get translated to v3 by ign-converter (i.e., when our Ignition sees a v2 config and lifts it to v3 internally).

Impact

Either broken networking or the instance fails to boot? Didn't check

Environment and steps to reproduce

Expected behavior

The v2 networkd unit (either a unit file or a drop-in) should be converted to a plain file entry in v3.

Additional information

[tormath1]

as a follow-up action, we should update our doc to reflect this breaking change (like: https://www.flatcar.org/docs/latest/provisioning/ignition/network-configuration/)

[tormath1]

PR has been merged - and the fix should be available in the next beta / alpha release.