added date acceptance patterns to Canadian locales, fdo#71664

Complete set is now Y-M-D;M-D;M/D/Y;M/D

Change-Id: I42ed59fb325b391943608a10ded7ce74c80656e1
(cherry picked from commit 2d8cac51c6d5205a27d90bd9237c8ed1e4b8deea)
Reviewed-on: https://gerrit.libreoffice.org/6726
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>