Bypass the yes/no prompt in 'apt-get upgrade'

Sure, although I have never tried it as an alias but it should work:

sudo apt-get update && sudo apt-get -y upgrade

apt-get -o Dpkg::Options::='--force-confold' --force-yes -fuy dist-upgrade"

To clarify Dpkg::Options::='--force-confold' from the man-page:

--force-confold: do not modify the current configuration file, the new version is installed with a .dpkg-dist suffix. With this option alone, even configuration files that you have not modified are left untouched. You need to combine it with --force-confdef to let dpkg overwrite configuration files that you have not modified.