Not run in CI so didn't notice. We had a shared file. But, now attrset
and list differ in what they can generate. Separate the expected test
files.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
The legacy attrset option type for `firefox.profiles.<name>.bookmarks`
was accidentally removed in 9d55428. This adds back support for this
type by refactoring the bookmarks submodule. This also adds a new test
ensuring this won't happen again.
