Support for Cluster Load Balancing

[dgonzalez85]

Enhancement summary

We are looking to replicate AI deployment. The following TOI describes how to configure CLB:

https://www.arista.com/en/support/toi/eos-4-32-2f/20434-cluster-load-balancing

load-balance cluster
  forwarding type <bridged encapsulation vxlan ipv4/forwarding type routed>
  destination grouping prefix length <prefix-length>
  flow source learning
    aging timeout <value> seconds
    limit <value>
  load-balance method flow round-robin
  port group host <name>
    interface ethernet <interface_list>
      flow limit <value> 
      flow exhaustion action descp/traffic-class
      flow warning <value> 

As the TOI mentiones it is also recommended to configure the following in order to improve the accuracy of aging and counters.

traffic-policies
  counter interface poll interval <2-30> seconds

But this option is not available today.

Which component of AVD is impacted

eos_cli_config_gen

Use case example

AI deployments using Cluster load balancing.

Describe the solution you would like

Use cli config gen commands to configure CLB.

Describe alternatives you have considered

No response

Additional context

No response

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