Bug 31373: Add INCLUDE_PATH to notice validation

Bug 31373: Add INCLUDE_PATH to notice validation

This is a follow-up to bug 31211. It adds the same INCLUDE_PATH
variables as C4::Templates adds during processing to prevent false
failures.

Test plan
1) Add an INCLUDE to any valid notice, for example:
   [% INCLUDE 'patron-title.inc' patron => patron %]
2) Save and continue
3) Confirm you are faced with a validation error complaining that
   the include file cannot be found
4) Apply this patch
5) Confirm that the reported error has dissapeared

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