Bug 12758: Add new module call in Koha::XSLT::Base

Bug 12758: Add new module call in Koha::XSLT::Base

Reviving a report back from 2014. The workaround is now moved to a
separate helper module from another patch.

Test plan:
Test OPACXSLTDetailsDisplay with an https reference.
You may try:
https://library.rijksmuseum.nl/opac-tmpl/bootstrap/en/xslt/zztest.xsl

If you flush and restart, the opac detail pages will contain the
text 'This is my MARC record.'.

NOTE: If you point to an xslt file over https that contains includes or
imports, you will still get the error: Failed to load external entity.
To address that, we need to extend the _resolve_includes sub.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>