Support for Low Latency tx-queue Scheduler Profile

[dgonzalez85]

Enhancement summary

We are looking to replicate AI deployment. There is a new qos scheduler profile that improves latency in R3 series as described in this TOI:

https://www.arista.com/en/support/toi/eos-4-33-1f/21081-low-latency-tx-queue-scheduler-profile

The following commands are required:

platform fap voq credit rates unified

The scheduler profile can be configured either globally per traffic class or per interface and tx-queue.
Global:

qos tx-queue <0-7> scheduler profile responsive

Per interface

interface Ethernet<X>
  tx-queue <0-7>
     scheduler profile responsive

Which component of AVD is impacted

eos_cli_config_gen

Use case example

R3 AI deployments

Describe the solution you would like

Configure these commands via eos_cli_config_gen for R3 platforms.

Describe alternatives you have considered

No response

Additional context

No response

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