Summary of changes: - Update the charmcraft.yaml file to use base and platforms, only allowing noble support. - Update config to default to caracal. - Update osci.yaml to use the charmcraft 3.x/beta - Drop non-noble tests - Update constraints file from -2024.1.txt to -noble.txt - Add charmbuild to .zuul.yaml Change-Id: Iee14563994479ae51c8943b50996e7acac832f90