support for qos class map configurations in eos cli config gen

[paulsstout]

Enhancement summary

There is no cli config gen for qos class maps and as such, we're using eos_cli in order to push those configurations from AVD./

Which component of AVD is impacted

eos_cli_config_gen

Use case example

class maps

group_csc_eos_cli: |
class-map match-any voice
match dscp ef
match dscp cs5
!
class-map match-any video
match dscp af41
match dscp cs4
!
class-map match-any apps
match dscp cs3
match dscp af31
match ip access-group ingress-tier1-apps
!
class-map match-any interactive-apps
match dscp cs2
match dscp af21
match ip access-group ingress-interactive-apps
!
class-map match-any scavenger
match dscp af11
match dscp cs1
!
class-map match-any bulk-data
!

Describe the solution you would like

variables in cli config gen for qos class maps

Describe alternatives you have considered

eos_cli

Additional context

No response

Contributing Guide

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[ClausHolbechArista]

We already cover everything that is asked here: https://avd.arista.com/5.2/ansible_collections/arista/avd/roles/eos_cli_config_gen/docs/input-variables.html#class-maps