general: update the @macsec_reboot test
First, check that the macsec interface goes up after a restart of the service, then also check after a reboot.
The underlying veth must be set as managed in udev if we want it to autoactivate after a reboot.
https://bugzilla.redhat.com/show_bug.cgi?id=2122564
The occuring crashes should be fixed by this: NetworkManager!1481 (merged)
Edited by Filip Pokryvka