Add new "PFC History Orch" for PFC historical statistics #3533
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PfcHistoryOrch is used to configure the flex counters for the PFC historical statistics feature. This change includes the lua script plugin that will be run.
This change depends on: sonic-net/sonic-swss-common#979
What I did
Created a new Orchagent to configure flex counters, and lua plugin to estimate historical PFC information from RX counters.
Why I did it
Part of the PFC Historical Statistics Feature: sonic-net/SONiC#1904
How I verified it
Details if related