Bug 32122: Correct permissions check on item circulation alerts

Bug 32122: Correct permissions check on item circulation alerts

This patch changes the check from 'item_circ_alerts' to 'manage_item_circ_alerts'

To test:
1 - Give an account catalogue and manage_item_circ_alerts permissions
2 - Log in to staff client iwht this account
3 - Browse to Admin->Item circulation alerts
4 - Error, you do not have permission to view this page
5 - Apply patch
6 - Restart all
7 - Browse to page agian, success!

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>