This reverts commit d38d7a1e.

We foundout why these weird dependencies are there. That is because
dependencies are resolved for whole package not just for specified build
package. This results to build of all python versions even if only one
of them in reality is needed. These dependencies mask that and ensure
that if package is going to be build that its python version is skipped.

This reverts commit 5d175ac8.

Userlists are now named as pkglists and are required bu
updater-ng-supervisor so no problem with drop there.

There is no more Install commands for pkglists alone because it is
dependency of updater-ng-supervisor and that is dependency of
foris in proxy. This means that Foris it self pulls pkglists in.

Exported variable can't be local!

This creates lists that can be included in to each other. This is done
by hack that original script calling one of these lists passes base URI
to access sources and that is later reused. This is how relative URI
should work in future but it is not completed now so we can overcome it
this way and have almost same support.

This also means that we no longer have to specify target branch for
lists because it no longer matters.

Fallback branch is for now dropped because we are not doing small build
at the moment. We should in future return to them but they will be
implemented differently then fallback branch is.

This also does some base list cleanup.

This is no longer needed and we have datacollect list instead for this.