Enable setting explicit address on service registrations

[shoenig]

One feature request from #12589 is for being able to advertise arbitrary addresses in Nomad services. We can probably do the same for Consul services as well, it's much of the same plumbing.

[jorgemarey]

Hi, just to follow on this. Would make sense to allow also setting tagged addresses on services?

Example:

    service {
      name = "gateway-mesh"
      port = "mesh_wan"

      check {
        name = "gateway-mesh-check-tcp"
        type = "tcp"
        interval = "1m"
        timeout = "15s"
      }

      tagged_addresses {
        wan = "${attr.unique.platform.aws.public-ipv4}:${NOMAD_PORT_mesh_wan}"
      }

      connect {
        gateway {
          mesh {}
          proxy {}
        }
      }
    }

[shoenig]

I like that idea, @jorgemarey. Do you mind creating a fresh issue so we can track it?

[jorgemarey]

Yes, of course. Will also try to make the PR

[jorgemarey]

Created in #12950

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