feat(filtersets): Add ContentTypeFilter to enhance filtering

Introduce `ContentTypeFilter` across several filtersets, including
`object_type`, `related_object_type`, `assigned_object_type`, and
`parent_object_type`. This improvement enhances filtering specificity
and aligns with existing usability standards.

Closes #20554

netbox/dcim/filtersets.py

@@ -1764,6 +1764,7 @@ class PowerOutletFilterSet(
 
 class MACAddressFilterSet(NetBoxModelFilterSet):
     mac_address = MultiValueMACAddressFilter()
+    assigned_object_type = ContentTypeFilter()
     device = MultiValueCharFilter(
         method='filter_device',
         field_name='name',