Add a GenericRelation to BaseInterface allowing MACAddress objects to be queried via "interface" reverse relation in permissions

Cleans up unused imports across `plugins.py` and a migration file.

Closes #20482

netbox/core/plugins.py

@@ -1,6 +1,5 @@
 import datetime
 import importlib
-import importlib.util
 from dataclasses import dataclass, field
 from typing import Optional
 

netbox/dcim/migrations/0188_racktype.py

@@ -3,9 +3,7 @@ import django.db.models.deletion
 import taggit.managers
 from django.db import migrations, models
 
-import utilities.fields
 import utilities.json
-import utilities.ordering
 
 
 class Migration(migrations.Migration):

netbox/dcim/models/device_components.py

@@ -618,6 +618,12 @@ class BaseInterface(models.Model):
         null=True,
         verbose_name=_('primary MAC address')
     )
+    mac_addresses = GenericRelation(
+        to='dcim.MACAddress',
+        content_type_field='assigned_object_type',
+        object_id_field='assigned_object_id',
+        related_query_name='interface',
+    )
 
     class Meta:
         abstract = True

netbox/ipam/models/ip.py

@@ -548,7 +548,7 @@ class IPRange(ContactsMixin, PrimaryModel):
     mark_utilized = models.BooleanField(
         verbose_name=_('mark utilized'),
         default=False,
-        help_text=_("Report space as 100% utilized")
+        help_text=_("Report space as fully utilized")
     )
 
     clone_fields = (