Remove the conda package building in favor of pypi and conda-forge

The goal is to remove our conda packages building and rely on the conda-forge recipe for importing packages released at Pypi.

We will need to:

• Remove the conda-related files in the packages;
• Remove the conda building pipeline in idiap-citools;
• Remove the conda constraints in the dev-profiles;
• Remove the conda-related code in idiap-devprofile;
• Add instructions on how to import packages into conda-forge after publishing them on pypi (and maybe automate this process?).