Geo tracking atabase entries created in specs with `let_it_be` and
`before_all` would not be cleaned up between test runs. By default,
let_it_be uses an adapter that only cleans records created via
`ActiveRecord::Base`. We fix this by introducing a custom adapter that
cleans the Geo tracking database and the main database.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/232749