[DASH] Add support for ENI counters

[vivekrnv]

What I did

Updated counterpoll cli to support configuration for ENI counters

root@dpu:/home/admin# counterpoll eni enable

root@dpu:/home/admin# counterpoll eni interval 1000 

root@dpu:/home/admin# counterpoll show
Type                        Interval (in ms)    Status
--------------------------  ------------------  --------
QUEUE_STAT                  default (10000)     enable
PORT_STAT                   default (1000)      enable
PORT_BUFFER_DROP            default (60000)     enable
RIF_STAT                    default (1000)      enable
QUEUE_WATERMARK_STAT        default (60000)     enable
PG_WATERMARK_STAT           default (60000)     enable
PG_DROP_STAT                default (10000)     enable
BUFFER_POOL_WATERMARK_STAT  default (60000)     enable
ACL                         10000               enable
ENI_STAT                    1000                enable 

How I did it

How to verify it

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

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

[prsunny]

Can you please provide the command output in the description?

[vivekrnv]

Can you please provide the command output in the description?

Updated