feat: add get_parent_supplier_groups using query builder

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
(cherry picked from commit cb610b79d2)

erpnext/setup/doctype/supplier_group/supplier_group.py

@@ -70,3 +70,13 @@ class SupplierGroup(NestedSet):
 	def on_trash(self):
 		NestedSet.validate_if_child_exists(self)
 		frappe.utils.nestedset.update_nsm(self)
+
+
+def get_parent_supplier_groups(supplier_group):
+	lft, rgt = frappe.db.get_value("Supplier Group", supplier_group, ["lft", "rgt"])
+	return frappe.get_all(
+		"Supplier Group",
+		filters=[["lft", "<=", lft], ["rgt", ">=", rgt]],
+		fields=["name"],
+		order_by="lft asc",
+	)