The manager will update the rest API call that list all plugins to return also (if exists):
fileserver path, to download the yaml file
yaml url path, to add to the blueprint import
The fileserver path, that will be used to download the yaml file, is unique per manager - since it'll include the plugin folder, which contain the plugin unique-id.
The yaml url path, that will be used in the blueprint, should be consistent for the given plugin among all manager - since it should be used for the same blueprint on different managers.