Signed-off-by: Christopher Baines <mail@cbaines.net>
With Guile 3, there's a potential for mock to work in even fewer circumstances. So, adapt the code to enable writing the tests without mock.
Add tests around the package module, extract out the use of the inferior-package record assessors so that they aren't part of the tests, and switch across the package-metadata module to use insert-missing-data-and-return-all-ids.
