Bug 31023: Quote authtypecode in FindDuplicateAuthorities

Bug 31023: Quote authtypecode in FindDuplicateAuthorities

To test:
0 - Have Koha using Elasticsearch
1 - Set  QueryRegexEscapeOptions to 'unescape escaped'
2 - Attempt to add a new 'GENRE/FORM' authority record
3 - On save you get a 500 error
Unable to understand your search query, please rephrase and try again.
 at /kohadevbox/koha/Koha/SearchEngine/Elasticsearch/Search.pm line 102
4 - Apply patch, restart all
5 - Attempt to add a new 'GENRE/FORM' authority record
6 - Success!

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>