Bug 32406: Switch acq datatable from headers to query param

Bug 32406: Switch acq datatable from headers to query param

This patch changes the pending orders datatable from using the
x-koha-query header to the "q" query parameter, so that it is
able to support UTF-8 encoded scripts rather than just Latin-1
scripts.

Test plan:

1. Apply patch
2. Go to
http://localhost:8081/cgi-bin/koha/cataloguing/addbiblio.pl?biblionumber=29
3. Change title from "Gairm" to "五" (alternatively use "cœur" or Arabic title)
4. Create a basket containing multiple records including bib 29 五
5. Close the basket
6. Receive shipment
7. You should be on a page like the following:
http://localhost:8081/cgi-bin/koha/acqui/parcel.pl?invoiceid=3
8. In the search box, type in 五
9. Note that you see a "Processing..." box and then the
results are filtered to just show the order for 五

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
tcohen amend: removed the line instead as we are probably phasing out
that DT configuration option anyway.

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