ospack: Disable fqdn resolution for sudo

When opening a new session sudo tries to resolve the fqdn of the host, but that introduces a sensible delay if the host does not have a fqdn set up appropriately, as it is often the case with development board or when booting images in QEMU.

We currently also ship libnss-myhostname which in theory could solve the issue at the system level and not just for sudo, but upstream configures it to come after dns resolution to avoid breaking hostname --fqdn, see https://github.com/systemd/systemd/issues/1280

Our use-case is sligthly different and we may configure libnss-myhostname to precede dns resolution, but in the meantime keep disabling this in sudo as the apertis-customization package used to do.