With #11627, both the `ContainerDebugCommand` name and the
`ConfigDebugCommand` name have been moved to the `debug` namespace.
Thus, references should be updated accordingly.
This command uses a new container pass which dumps the ContainerBuilder into a cache file by serializing it. It's possible that we don't want this to run when kernel.debug = false, but I don't see the harm of generating the file and running the container:debug in, for example, the prod environment seems to make sense.
