13745 device type migration (#13747)

* 13745 update migrations to use batch_size

* 13745 update migrations to use subquery update

* 13745 refactor and update other counter migrations

netbox/utilities/counters.py

@@ -1,5 +1,5 @@
 from django.apps import apps
-from django.db.models import F
+from django.db.models import F, Count, OuterRef, Subquery
 from django.db.models.signals import post_delete, post_save
 
 from netbox.registry import registry
@@ -23,6 +23,24 @@ def update_counter(model, pk, counter_name, value):
     )
 
 
+def update_counts(model, field_name, related_query):
+    """
+    Perform a bulk update for the given model and counter field. For example,
+
+        update_counts(Device, '_interface_count', 'interfaces')
+
+    will effectively set
+
+        Device.objects.update(_interface_count=Count('interfaces'))
+    """
+    subquery = Subquery(
+        model.objects.filter(pk=OuterRef('pk')).annotate(_count=Count(related_query)).values('_count')
+    )
+    return model.objects.update(**{
+        field_name: subquery
+    })
+
+
 #
 # Signal handlers
 #