make baseline have working ethernet networking, like releng

configs/baseline/airootfs/etc/systemd/network/20-ethernet.network

+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+[Match]
+Name=en*
+Name=eth*
+
+[Network]
+DHCP=yes
+IPv6PrivacyExtensions=yes
+
+[DHCP]
+RouteMetric=512

configs/baseline/airootfs/etc/systemd/system/multi-user.target.wants/systemd-networkd.service

+/usr/lib/systemd/system/systemd-networkd.service
\ No newline at end of file

configs/baseline/airootfs/etc/systemd/system/multi-user.target.wants/systemd-resolved.service

+/usr/lib/systemd/system/systemd-resolved.service
\ No newline at end of file

configs/baseline/airootfs/etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service

+/usr/lib/systemd/system/systemd-networkd-wait-online.service
\ No newline at end of file

configs/baseline/airootfs/etc/systemd/system/sockets.target.wants/systemd-networkd.socket

+/usr/lib/systemd/system/systemd-networkd.socket
\ No newline at end of file

configs/baseline/airootfs/etc/systemd/system/systemd-networkd-wait-online.service.d/wait-for-only-one-interface.conf

+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+[Service]
+ExecStart=/usr/lib/systemd/systemd-networkd-wait-online --any