[MOV] event: move the security tests to "Test Event Full"

Purpose
=======
Move the security tests of event to "Test Event Full", so if we
change the ACLs in a sub-modules, we are sure to test it.

Task 2204364
PR odoo/odoo/pull/65867
Migration odoo/upgrade/pull/2150

addons/event/tests/__init__.py

@@ -4,4 +4,3 @@
 from . import test_event_flow
 from . import test_event_internals
 from . import test_event_mail_schedule
-from . import test_event_security

addons/test_event_full/tests/__init__.py

@@ -4,3 +4,4 @@
 from . import common
 from . import test_event_crm
 from . import test_wevent_register
+from . import test_event_security