Currently, module changes from `setup_dependent_package` are applied only to the module of the package class, but not to any parent classes' modules between the package class module and `spack.package_base`.
In this PR, we create a custom class to accumulate module changes, and apply those changes to each class that requires it. This design allows us to code for a single module, while applying the changes to multiple modules as needed under the hood, without requiring the user to reason about package inheritance.
5f59821433