Bug 32401: Remove x-koha-query support

Bug 32401: Remove x-koha-query support

HTTP headers can only contain ASCII characters, and it is thus
impractical to use a header for passing DB queries that could contain
non-ascii characters.

We don't need it, and should be removed.

This patch removes traces from the datatables.js files and also from
detail.tt, which had it set to false anyway.

See bug 32406 and bug 32409 for the cases in which it was being used,
and problematic.

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