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 - Add rename.sh to build process - Specify rustc-1.76 in charmcraft.yaml Change-Id: I97b1633cc3a874f6f4adf5f164007c3cc5cf8017