Scoru: rename field `status` of sc_rollup_refute to avoid duplicate with existing `status` field for manager operations.

Eg, see operation_result field below:

{
  "kind":"sc_rollup_refute",
  "source":"tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN",
  "fee":"12000",
  "counter":"3",
  "gas_limit":"12000",
  "storage_limit":"1028",
  "rollup":"scr1Q6PceQasvmfvsmqhTj2MVHQjsyNeV5wDE",
  "opponent":"tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx",
  "refutation":null,
  "metadata":{
    "balance_updates":[
      {
        "kind":"contract",
        "contract":"tz1gjaF81ZRRvdzjobyfVNsAeSC6PScjfQwN",
        "change":"-12000",
        "origin":"block"
      },
      {
        "kind":"accumulator",
        "category":"block fees",
        "change":"12000",
        "origin":"block"
      }
    ],
    "operation_result":{
      "status":"applied",
      "consumed_milligas":"9381344",
      "status":"ongoing",
      "balance_updates":[
        
      ]
    }
  }
}