Describe the solution you'd like
I'd like to have the option to enable and configure SAG, including IPv4 and IPv6 anycast adresses.

Describe alternatives you've considered
Use RESTCONF

- name: Configure SAG
  dellemc.enterprise_sonic.sonic_api:
    url: data/sonic-sag:sonic-sag
    method: "PATCH"
    body:
      sonic-sag:sonic-sag:
        SAG:
          SAG_LIST: "{{ sonic_sag_list }}"
        SAG_GLOBAL:
          SAG_GLOBAL_LIST:
            - IPv4: enable
              IPv6: enable
              gwmac: "{{ sonic_sag_virtual_mac }}"
              table_distinguisher: IP
    status_code: 204
  when: sonic_sag_enabled
  notify: Write sonic restconf config

Additional context
sonic_l3_interfaces supports setting IPv4 anycast addresses but not IPv6, and enabling SAG is not supported at all.

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