Simplify event triggering

- add generic receivers for database actions
- exclude django_q tables, otherwise we get an infinite loop!

Ref: https://stackoverflow.com/questions/17507784/consolidating-multiple-post-save-signals-with-one-receiver/32230933#32230933

InvenTree/build/models.py

@@ -1067,11 +1067,6 @@ def after_save_build(sender, instance: Build, created: bool, **kwargs):
         # Run checks on required parts
         InvenTree.tasks.offload_task('build.tasks.check_build_stock', instance)
 
-        trigger_event('build.created', build_id=instance.pk)
-
-    else:
-        trigger_event('build.saved', build_id=instance.pk)
-
 
 class BuildOrderAttachment(InvenTreeAttachment):
     """