The Content Sources service can now be used for handling package info and
search. The api call to this service requires a list of repo urls. The
`repos.json` file tracks the supported repositories for each distro.
This is then mapped into a url array for whichever distro we are
searching for packages. The response body is similar to what existed in
image-builder but the key `package_name` needs to be mapped to just
`name`. Also, there is no pagination in Content Sources for `/rpms/names`
so we can currently only fetch a limit of 20 packages.
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