eos_designs: missing monitor_sessions definition for l3_interfaces

[c-po]

Enhancement summary

There is no possibility to define / use the provided monitor_sessions also for l3_interfaces.

Which component of AVD is impacted

eos_designs

Use case example

We have a DANZ monitoring fabric connected to our L3LS fabric. The monitoring sessions are configured genericly under port_profiles for all out connected endpoints.

At the time of this writing it's not possible to also re-use the existing YML nodes to enable a monitoring port for a l3_interface.

monitoring_session key is only supported for:

<connected_endpoints_keys.key>:
network_ports:
port_profiles

Describe the solution you would like

network_services_keys.name>:
  - name: foo
    vrfs:
      - name: red
        l3_interfaces:
          - interfaces: Eth1
            monitor_sessions:
              - name: DMF
                role: source
                source_settings:
                  direction: both

Describe alternatives you have considered

Workaround is to use the structured_config field

Additional context

No response

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