Move "classification" IDs from editions to corresponding works

The Dewey Decimal Class and LoC Classification is often mistakenly found at edition records when it properly belongs to the entire corresponding work. The same could also be said for Goodreads and LibraryThing identifiers.

For example see https://openlibrary.org/works/OL3907500W and its various editions such as https://openlibrary.org/books/OL4562383M.

Previously discussed at https://github.com/internetarchive/openlibrary/issues/497

Addressing this could massively improve the ease of finding duplicate works, particularly when they are in different languages.