Define custom json formatting for channel origin

[pm47]

It has been broken when we refactored the types.

Currently it looks like this:

"originChannels": {
        "6": {
          "replyTo": {
            "path": {
              "parent": {
                "parent": {
                  "parent": {
                    "parent": {
                      "parent": {
                        "parent": {
                          "address": {
                            "protocol": "akka",
                            "system": "eclair-node"
                          },
                          "name": "/"
                        },
                        "name": "user",
                        "uid": 0
                      },
                      "name": "$j",
                      "uid": 560290201
                    },
                    "name": "relayer",
                    "uid": 649831089
                  },
                  "name": "channel-relayer",
                  "uid": -1728719205
                },
                "name": "d9e62dae-8be0-4333-9de3-6ce368b6d4d5",
                "uid": -1018113206
              },
              "name": "$$a-adapter",
              "uid": 662265840
            },
            "provider": {}
          },

We could serialize the origin like so:

{
  "origin": "local-hot"
  "uuid": "......"
}
{
  "origin": "local-cold"
  "uuid": "......"
}
{
  "origin": "channel-relayed-hot"
  "origin": {
    "originChannelId": "...",
    "originHtlcId": "..."
  }
}
{
  "origin": "channel-relayed-hot"
    "origin": {
    "originChannelId": "...",
    "originHtlcId": "..."
  }
}
{
  "origin": "trampoline-relayed-hot"
    "origins": [
    {
      "originChannelId": "...",
      "originHtlcId": "..."
    },
    {
      "originChannelId": "...",
      "originHtlcId": "..."
    }
    ]
}
{
  "origin": "trampoline-relayed-cold"
    "origins": [
    {
      "originChannelId": "...",
      "originHtlcId": "..."
    },
    {
      "originChannelId": "...",
      "originHtlcId": "..."
    }
    ]
}