Bug 23247: Use EmbedItems in opac-MARCdetail.pl

Bug 23247: Use EmbedItems in opac-MARCdetail.pl

This patch uses the EmbedItems processor to add the items to the MARC
record.

To test:
- Find a known record, go to the OPAC MARC page of it.
- Play with several options in OpacHiddenItems, refreshing it
- Play with OpacHiddenItemsExceptions as well
=> SUCCESS: Things work as expected
- Apply this patch
- Repeate the tests above
=> SUCCESS: Things work as expected!
- Sign off :-D

Seems to work as advertised.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: LMSCloudPaulD <paul.derscheid@lmscloud.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>