Bug 33626: Remove invalid params

Bug 33626: Remove invalid params

This patch reformats the params passed to scroll_helper as defined here:
https://metacpan.org/pod/Search::Elasticsearch::Client::7_0::Scroll

To test:
1 - perl misc/maintenance/compare_es_to_db.pl
2 - It dies:
[Param] ** Unknown param (scroll_in_qs) in (search) request. , called from sub Search::Elasticsearch::Client::7_0::Direct::scroll_helper at misc/maintenance/compare_es_to_db.pl line 55.
3 - Apply patch
4 - Repeat
5 - It succeeds!

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>