Bug 34807: Move EnableItemGroups in cataloging preferences

Bug 34807: Move EnableItemGroups in cataloging preferences

This patch moves the EnableItemGroups system preference with cataloging
preferences, as it deals with the grouping of items in a bibliographic record.

To test:
1. Apply patch
2. Go to Administration > System preferences
3. Search for enableitemgroup
--> EnableItemGroups should be in cataloging preferences
--> EnableItemGroupHolds should be in circulation preferences

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>