Closes #14153: Filter ContentTypes by supported feature (#14191)

* WIP

* Remove FeatureQuery

* Standardize use of proxy ContentType for models

* Remove TODO

* Correctly filter BookmarksWidget object_types choices

* Add feature-specific object type validation

netbox/dcim/models/cables.py

@@ -2,7 +2,6 @@ import itertools
 from collections import defaultdict
 
 from django.contrib.contenttypes.fields import GenericForeignKey
-from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.db.models import Sum
@@ -10,12 +9,12 @@ from django.dispatch import Signal
 from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
 
+from core.models import ContentType
 from dcim.choices import *
 from dcim.constants import *
 from dcim.fields import PathField
 from dcim.utils import decompile_path_node, object_to_path_node
 from netbox.models import ChangeLoggedModel, PrimaryModel
-
 from utilities.fields import ColorField
 from utilities.querysets import RestrictedQuerySet
 from utilities.utils import to_meters
@@ -258,7 +257,7 @@ class CableTermination(ChangeLoggedModel):
         verbose_name=_('end')
     )
     termination_type = models.ForeignKey(
-        to=ContentType,
+        to='contenttypes.ContentType',
         limit_choices_to=CABLE_TERMINATION_MODELS,
         on_delete=models.PROTECT,
         related_name='+'

netbox/dcim/models/device_component_templates.py

@@ -1,5 +1,4 @@
 from django.contrib.contenttypes.fields import GenericForeignKey
-from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
@@ -709,7 +708,7 @@ class InventoryItemTemplate(MPTTModel, ComponentTemplateModel):
         db_index=True
     )
     component_type = models.ForeignKey(
-        to=ContentType,
+        to='contenttypes.ContentType',
         limit_choices_to=MODULAR_COMPONENT_TEMPLATE_MODELS,
         on_delete=models.PROTECT,
         related_name='+',

netbox/dcim/models/device_components.py

@@ -1,7 +1,6 @@
 from functools import cached_property
 
 from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
-from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
@@ -1181,7 +1180,7 @@ class InventoryItem(MPTTModel, ComponentModel, TrackingModelMixin):
         db_index=True
     )
     component_type = models.ForeignKey(
-        to=ContentType,
+        to='contenttypes.ContentType',
         limit_choices_to=MODULAR_COMPONENT_MODELS,
         on_delete=models.PROTECT,
         related_name='+',