[consutil] Display remote device name in show command

[Blueve]

- What I did

Display remote device name in consutil show result table

- How I did it

Read remote device name from CONFIG_DB and append it to consutil show result table.

- will be displayed if there are no configured remote device name.

- How to verify it

Build a deb and test it on a physical DUT with following CONSOLE_PORT configuration:

    "CONSOLE_PORT": {
        "1": {
            "remote_device": "switch1",
            "baud_rate": "9600",
            "flow_control": "1"
        }
    }

- Previous command output (if the output of a command-line utility has changed)

admin@sonic:~$ sudo consutil show
  Line    Actual/Configured Baud    PID    Start Time
------  ------------------------  -----  ------------
     0      9600/-              
     1      9600/9600           
     2      9600/-              
     3      9600/-              
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- New command output (if the output of a command-line utility has changed)

admin@sonic:~$ sudo consutil show
  Line    Actual/Configured Baud    PID    Start Time    Device
------  ------------------------  -----  ------------  --------
     0      9600/-                                            -
     1      9600/9600                                   switch1
     2      9600/-                                            -
     3      9600/-                                            -
     4      9600/-                                            -
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