Update Huawei TTP template for improved system information display

- Modified the Huawei TTP template to enhance the system information output by including the line identifier and slot number alongside the version and serial number. This change aims to provide clearer context for system diagnostics.

oxi/interfaces/models/templates/huawei.ttp

@@ -45,7 +45,8 @@ default_system = {
 </vars>
 
 <group name="system" default="default_system">
-# VRP (R) software, Version {{ version }} ({{ model }} {{ serial_number }})
+# VRP (R) software, Version {{ version }} {{ _line_ }}
+# ESN of slot {{ slot_number }}: {{ serial_number }}
 </group>
 
 <group name="interfaces">