Feature(eos_cli_config_gen): Add option for dot1x aaa accounting update interval <x> seconds

[pvinci-arista]

Enhancement summary

Enable the option for the global dot1x option aaa accounting update interval <x> seconds

Which component of AVD is impacted

eos_cli_config_gen

Use case example

This is a configuration option necessary for COA support.

Describe the solution you would like

Add a new key such as:

dot1x:
  aaa:
    update interval_secs: 5

To render the stanza:

dot1x
  aaa accounting update interval 5 seconds

Describe alternatives you have considered

This works today with:

dot1x
  aaa accounting update interval 5 seconds

Additional context

No response

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