Bug 32825: Fix cataloguing/value_builder/unimarc_field_105.pl

Bug 32825: Fix cataloguing/value_builder/unimarc_field_105.pl

Use event parameter

This is part of the refactoring happening in bug 30975

Test plan:
1. Verify that the plugin continues to work as before

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 7ec85d23949b97dd0eea3efbd7acdf4abf3a068e)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
(cherry picked from commit 98262166d911515a2ac38564c499218ab9d2fb84)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>