Add shutdown command to Huawei interface template and update configuration files

- Included the `shutdown` command in the Huawei interface template to manage interface states.
- Added a new interface configuration in `config.conf` with the `shutdown` command.
- Updated the expected output JSON to reflect the new interface and its shutdown state for accurate testing and validation of configurations.

oxi/interfaces/models/templates/huawei.ttp

@@ -21,6 +21,7 @@ default_system = {
 <group name="interfaces">
 interface {{ interface }}
  description {{ description | ORPHRASE }}
+ shutdown {{ shutdown | set(True) }}
  ip address {{ ip_address }} {{ mask | to_cidr }}
 </group>
 <group name="vlans">