Bug 20244: Improve Elasticsearch ISBN indexing

Bug 20244: Improve Elasticsearch ISBN indexing

https://bugs.koha-community.org/show_bug.cgi?id=20244

Test plan:

1. Add a record with an ISBN-10 or ISBN-13 that can be converted to ISBN-10 (e.g. 1-56619-909-3).
2. Verify that the record can be found by searching for "1-56619-909-3", "1566199093", "978-1-56619-909-4" and "9781566199094".

Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>