feat: Add diff and Dockerfile support for template version page (#5339)

coderd/database/queries/templateversions.sql

@@ -122,5 +122,7 @@ WHERE
 		FROM template_versions AS tv
 		WHERE tv.organization_id = $1 AND tv.name = $2 AND tv.template_id = $3
 	)
+	AND organization_id = $1
+	AND template_id = $3
 ORDER BY created_at DESC
 LIMIT 1;