Merge hooks/ and katello/hooks into a single directory structure
As part of this effort, hooks that have a similar naming scheme or functionality should be reduced to a single parameter.
The current state is having two sets of hooks directories: hooks/ and katello/hooks/. There are some hooks that have similar functionality and some that are only relevant if Katellos is enabled. The proposal here is to merge the hooks directories and combine some hooks into one. See [Hooks Cleanup RFC](https://community.theforeman.org/t/rfc-cleaning-up-installer-hooks/17089) for more details.