Support for DLB on ECMP groups

[dgonzalez85]

Enhancement summary

We are looking to replicate configurations for AI deployment. This feature enables DLB that considers traffic load of the memebers of the ECMP groups:

https://www.arista.com/en/support/toi/eos-4-24-2f/14562-support-for-dynamic-load-balancing-on-ecmp-groups

ip hardware fib load-balance distribution dynamic
ip hardware fib load-balance distribution dynamic flow-set-size 5

(config)#ip hardware fib load-balance distribution ?
  dynamic  Enable dynamic load balancing
  hash     Enable hash based load balancing

(config)#ip hardware fib load-balance distribution dynamic flow-set-size ?
  <1-7>  Flow set size value

This is currently not supported:
https://avd.arista.com/5.1/roles/eos_cli_config_gen/docs/input-variables.html#ip-hardware

Which component of AVD is impacted

eos_cli_config_gen

Use case example

Enable DLB for AI deployments.

Describe the solution you would like

Expand ip-hardware section in eos_cli_config_gen to support this.

Describe alternatives you have considered

custom_structured_configuration_eos_cli: |
ip hardware fib load-balance distribution dynamic
ip hardware fib load-balance distribution dynamic flow-set-size 5

Additional context

No response

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