Fix issue with missing tags on MySQL

Had to change the base class for `TaggedItem` from `GenericTaggedItemBase` to `GenericUUIDTaggedItemBase`, to get the django-taggit machinery to do a UUID-based comparison of the prefetched "tags". Without that the prefetched values weren't matching correctly, and were returning empty. (See: jazzband/django-taggit#663)

nautobot/extras/models/tags.py

@@ -1,7 +1,7 @@
 from django.db import models
 from django.urls import reverse
 from django.utils.text import slugify
-from taggit.models import TagBase, GenericTaggedItemBase
+from taggit.models import TagBase, GenericUUIDTaggedItemBase
 
 from nautobot.extras.models import ChangeLoggedModel, CustomFieldModel
 from nautobot.extras.models.relationships import RelationshipModel
@@ -47,7 +47,7 @@ def to_csv(self):
         return (self.name, self.slug, self.color, self.description)
 
 
-class TaggedItem(BaseModel, GenericTaggedItemBase):
+class TaggedItem(BaseModel, GenericUUIDTaggedItemBase):
     tag = models.ForeignKey(to=Tag, related_name="%(app_label)s_%(class)s_items", on_delete=models.CASCADE)
     object_id = models.UUIDField()