Closes #11558: Add support for remote data sources (#11646)

* WIP

* WIP

* Add git sync

* Fix file hashing

* Add last_synced to DataSource

* Build out UI & API resources

* Add status field to DataSource

* Add UI control to sync data source

* Add API endpoint to sync data sources

* Fix display of DataSource job results

* DataSource password should be write-only

* General cleanup

* Add data file UI view

* Punt on HTTP, FTP support for now

* Add DataSource URL validation

* Add HTTP proxy support to git fetcher

* Add management command to sync data sources

* DataFile REST API endpoints should be read-only

* Refactor fetch methods into backend classes

* Replace auth & git branch fields with general-purpose parameters

* Fix last_synced time

* Render discrete form fields for backend parameters

* Enable dynamic edit form for DataSource

* Register DataBackend classes in application registry

* Add search indexers for DataSource, DataFile

* Add single & bulk delete views for DataFile

* Add model documentation

* Convert DataSource to a primary model

* Introduce pre_sync & post_sync signals

* Clean up migrations

* Rename url to source_url

* Clean up filtersets

* Add API & filterset tests

* Add view tests

* Add initSelect() to HTMX refresh handler

* Render DataSourceForm fieldsets dynamically

* Update compiled static resources

netbox/core/forms/bulk_edit.py

@@ -0,0 +1,50 @@
+from django import forms
+from django.utils.translation import gettext as _
+
+from core.choices import DataSourceTypeChoices
+from core.models import *
+from netbox.forms import NetBoxModelBulkEditForm
+from utilities.forms import (
+    add_blank_choice, BulkEditNullBooleanSelect, CommentField, SmallTextarea, StaticSelect,
+)
+
+__all__ = (
+    'DataSourceBulkEditForm',
+)
+
+
+class DataSourceBulkEditForm(NetBoxModelBulkEditForm):
+    type = forms.ChoiceField(
+        choices=add_blank_choice(DataSourceTypeChoices),
+        required=False,
+        initial='',
+        widget=StaticSelect()
+    )
+    enabled = forms.NullBooleanField(
+        required=False,
+        widget=BulkEditNullBooleanSelect(),
+        label=_('Enforce unique space')
+    )
+    description = forms.CharField(
+        max_length=200,
+        required=False
+    )
+    comments = CommentField(
+        widget=SmallTextarea,
+        label=_('Comments')
+    )
+    parameters = forms.JSONField(
+        required=False
+    )
+    ignore_rules = forms.CharField(
+        required=False,
+        widget=forms.Textarea()
+    )
+
+    model = DataSource
+    fieldsets = (
+        (None, ('type', 'enabled', 'description', 'comments', 'parameters', 'ignore_rules')),
+    )
+    nullable_fields = (
+        'description', 'description', 'parameters', 'comments', 'parameters', 'ignore_rules',
+    )