Adapt the qa to not do everything that is there.

This allows to fail early and only once.

Fixes #93
See:
https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-virtual.html
for more information on conda virtual packages

[ci] add initial support for cuda virtual package. run conda info at an Idiap machine to get the latest value

Revert "[temp] temporarily disable bob-devel since metadata-patches need to be released first"

This reverts commit 4d019196.

This reverts commit d088f518.

Split build of bob-devel, deps, and bob.devtools
to separate builds in the CI

This reverts merge request !214