[vstest][virtual chassis] Removed dvs.runcmd using click commands (sonic-net#2214)

[VS] click commands usage is avoided in test_virtual_chassis.py

Author: vganesan-nokia

tests/test_virtual_chassis.py

@@ -39,7 +39,7 @@ def config_inbandif_port(self, vct, ibport):
 
             # Configure only for line cards
             if cfg_switch_type == "voq":
-                dvs.runcmd(f"config interface startup {ibport}")
+                dvs.port_admin_set(f"{ibport}", "up")
                 config_db.create_entry("VOQ_INBAND_INTERFACE", f"{ibport}", {"inband_type": "port"})
 
     def del_inbandif_port(self, vct, ibport):