Feat (eos_cli_config_gen): Add support for SNMP server shape-rate

[ctyrider]

Enhancement summary

Add support for the following CLI syntax (at the global config level):

snmp-server ifmib ifspeed shape-rate

Which component of AVD is impacted

eos_cli_config_gen

Use case example

Enable global support for SNMP ifspeed reflecting shaping rate

Describe the solution you would like

Add support for eos_cli_config_gen along the lines of:

snmp_server:
  ifmib:
     ifspeed: <str; "shape-rate">

Describe alternatives you have considered

n/a

Additional context

n/a

Contributing Guide

• I agree to follow this project's Code of Conduct

[ctyrider]

@gusmb - could we create a pull request for this one?

[ClausHolbechArista]

Please do:

snmp_server:
  ifmib_ifspeed_shape_rate: <bool>

Thanks.