Proposing two changes here that are related:

1. Allow passing --assumeyes to packages update to not prompt the user when doing an update of all packages
2. Add a --cache option that allows packages update to download but not install packages, the idea here is to provide users with two steps that they can orchestrate independently -- downloading of updates and application of the updates.

These two changes come from https://bugzilla.redhat.com/show_bug.cgi?id=2042899#c9

I'm cool with the changes (minus the few style comments I had) and you offended the 👮‍♂️

Yea, for some reason Rubocop is throwing errors that are not showing up locally and it's really confusing.