Splits the definitions into two dicts, while joining then for now to
preserve the downloads dict.
Update all consumers of the variables, which are roughly:
- manual includes of the download role (which will be removed in the
short future)
- install tasks using the resolved 'dest' to find the artefacts
This will make further division of the downloads role easier.
Mixing two semantically distincts artefacts makes things harder to read
and to consume from other code.
Needed for clean filtering on container / file.
Max Gautier
Vlad Korolev
Bas
ERIK
Romain
Samuel Liu