Add %ansible_roles_dir and %ansible_collections_dir
    
    We expect collections to use %ansible_collection_install and
    %ansible_collection_file{s,list}. I'm mainly defining
    %ansible_collection_dir for use in our macros.
    
    There are a couple packaged roles in Fedora that can use
    %ansible_roles_dir. This can also be used if we decide to implement
    macros for packaging roles.