fix(network-manager): use /run/NetworkManager/initrd/neednet in initqueue

fix(network-manager): use /run/NetworkManager/initrd/neednet in initqueue

We don't want to start NetworkManager if networking is not needed.
Right now nm-config.sh lays down /usr/lib/dracut/hooks/initqueue/finished/nm.sh
which will cause the initqueue to run. If nothing exists in
/usr/lib/dracut/hooks/initqueue/finished/ then it will short circuit and
the initqueue won't run anything. But what if something else needed
something to run in the initqueue? nm-run.sh would still get started,
even though /usr/lib/dracut/hooks/initqueue/finished/nm.sh didn't exist.
In this case let's just trigger off of /run/NetworkManager/initrd/neednet
like we are doing in the systemd unit (nm-run.service).