'ui_visibility' help is missing in Custom Fields Bulk Import form
### NetBox version

v3.3.2

### Python version

3.10

### Steps to Reproduce

1. Browse to the Custom Field Bulk Import
2. Reach the documentation of the `ui_visibility` field
3. Notice that the blue help button is missing to describe the available choices


### Expected Behavior

A blue help button should be present to describe the available choices.

### Observed Behavior

The `ui_visibility` field should be a `CSVChoiceField` to allow for the Choices modal to display with its button.
diff --git a/netbox/extras/forms/bulk_import.py b/netbox/extras/forms/bulk_import.py
index d9148a5c3..e83cac3b9 100644
--- a/netbox/extras/forms/bulk_import.py
+++ b/netbox/extras/forms/bulk_import.py
@@ -3,7 +3,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.contrib.postgres.forms import SimpleArrayField
 from django.utils.safestring import mark_safe
 
-from extras.choices import CustomFieldTypeChoices
+from extras.choices import CustomFieldVisibilityChoices, CustomFieldTypeChoices
 from extras.models import *
 from extras.utils import FeatureQuery
 from utilities.forms import CSVChoiceField, CSVContentTypeField, CSVModelForm, CSVMultipleContentTypeField, SlugField
@@ -38,6 +38,10 @@ class CustomFieldCSVForm(CSVModelForm):
         required=False,
         help_text='Comma-separated list of field choices'
     )
+    ui_visibility = CSVChoiceField(
+        choices=CustomFieldVisibilityChoices,
+        help_text='How the custom field is displayed in the user interface'
+    )
 
     class Meta:
         model = CustomField
['netbox/extras/forms/bulk_import.py']