Bug 31028: Add email notification of cataloguers on submissions

Bug 31028: Add email notification of cataloguers on submissions

This patch adds an optional cataloger notification to email the
cataloging team whenever a new catalog concern is reported.

Test plan
1) Enable `OpacCatalogConcerns`
2) Add at least one email address to the new `CatalogerEmails`
   prefernce (a comma delimited list is also allowed).
3) Confirm that a default template has been added to the Notices
   management, `TICKET_NOTIFY`.
4) Submit a new concern using the OPAC
5) Confirm that an email is sent to those email addresses listed in
   CatalogerEmails.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Helen Oliver <HOliver@tavi-port.ac.uk>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>