Feat(eos_cli_config_gen): add hardware flow tracking standard record format support

[matthewgottlieb]

Enhancement summary

In order to stream IPFIX-based flow tracking data to CloudVision, EOS must be configured with record format ipfix standard timestamps counters under flow tracking hardware. This command is not currently exposed through eos_cli_config_gen.

Which component of AVD is impacted

eos_cli_config_gen

Use case example

CCS platforms (which support hardware flow tracking) showing traffic flow data in CloudVision.

Describe the solution you would like

Add a boolean record_format_ipfix_standard_timestamps_counters (or similar) under flow_tracking: hardware

Describe alternatives you have considered

raw_eos_cli at the "root" device level is the only current alternative I've found. If eos_cli could be supported under flow tracking: hardware, this might be an alternative.

Additional context

EOS documentation: https://www.arista.com/en/support/toi/eos-4-23-1f/14409-hardware-flow-tracking-with-ipfix-export#:~:text=To%20configure%20standard%20IPFIX%20information%20elements%20for%20timestamps%20and%20counters%3A

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