Create least cost routing routes and carrier set entries

Example request

[
  {
    "lcr_sid": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "regex": "1*",
    "priority": 1,
    "description": "this is example description",
    "lcr_carrier_set_entries": [
      {
        "workload": 90,
        "lcr_route_sid": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
        "voip_carrier_sid": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
        "priority": 1
      }
    ]
  }
]