Closes #11559: Implement config template rendering (#11769)

* WIP

* Add config_template field to Device

* Pre-fetch referenced templates

* Correct up_to_date callable

* Add config_template FK to Device

* Update & merge migrations

* Add config_template FK to Platform

* Add tagging support for ConfigTemplate

* Catch exceptions when rendering device templates in UI

* Refactor ConfigTemplate.render()

* Add support for returning plain text content

* Add ConfigTemplate model documentation

* Add feature documentation for config rendering

netbox/extras/tables/tables.py

@@ -8,6 +8,7 @@ from .template_code import *
 
 __all__ = (
     'ConfigContextTable',
+    'ConfigTemplateTable',
     'CustomFieldTable',
     'CustomLinkTable',
     'ExportTemplateTable',
@@ -223,6 +224,34 @@ class ConfigContextTable(NetBoxTable):
         default_columns = ('pk', 'name', 'weight', 'is_active', 'is_synced', 'description')
 
 
+class ConfigTemplateTable(NetBoxTable):
+    name = tables.Column(
+        linkify=True
+    )
+    data_source = tables.Column(
+        linkify=True
+    )
+    data_file = tables.Column(
+        linkify=True
+    )
+    is_synced = columns.BooleanColumn(
+        verbose_name='Synced'
+    )
+    tags = columns.TagColumn(
+        url_name='extras:configtemplate_list'
+    )
+
+    class Meta(NetBoxTable.Meta):
+        model = ConfigTemplate
+        fields = (
+            'pk', 'id', 'name', 'description', 'data_source', 'data_file', 'data_synced', 'created', 'last_updated',
+            'tags',
+        )
+        default_columns = (
+            'pk', 'name', 'description', 'is_synced',
+        )
+
+
 class ObjectChangeTable(NetBoxTable):
     time = tables.DateTimeColumn(
         linkify=True,