[ifupdown] Fix bridges down at boot with Debian bookworm systemd

With Debian bookworm systemd 252.6-1, the bridge is stopped immediately
after attempting its startup.
It could be that this newer systemd removed the unexpected behavior that allowed to start
the service while its "BindsTo" device does not exists.

(cherry picked from commit 140db62)

ansible/roles/ifupdown/templates/etc/systemd/system/iface@.service.j2

@@ -14,7 +14,7 @@ Documentation=https://bugs.debian.org/819314
 After=local-fs.target network-pre.target networking.service systemd-sysctl.service
 Before=network.target shutdown.target network-online.target
 Conflicts=shutdown.target
-BindsTo=sys-subsystem-net-devices-%i.device
+After=sys-subsystem-net-devices-%i.device
 ConditionPathIsDirectory=/run/network
 DefaultDependencies=no
 IgnoreOnIsolate=yes