Add a new controller for MetaMetrics Data Deletion

[NiranjanaBinoy]

Part of https://github.com/MetaMask/MetaMask-planning/issues/880

The controller will have API calls to create the DELETE_ONLY regulation based on USER_ID and check the status of an existing regulation or current regulation based on regulation ID.

Creating data deletion regulation:

• Api call to create delete regulation
• POST method
• Regulationtype: DELETE_ONLY
• subjectType: USER_ID
• subjectId: metametricsId
• Returns => Success or Error
• Save the regulation id and creation date to state

Get the status of the existing regulation:

• Api call to get the details of the existing regulation using regulation id from state.
• GET method
• Parameter: existing regulation id
• Returns =>

{
  "data": {
    "regulation": {
      "id": "1qJkfE1tpwvQcklImGksLN629wn",
      "workspaceId": "9aQ1Lj62S4bomZKLF4DPqW",
      "overallStatus": "FINISHED",
      "finishedAt": "2022-03-08T00:39:36.546951Z",
      "createdAt": "2022-03-08T00:39:36.546951Z",
      "streamStatus": []
    }
  }
}

• In our context, we will be using only overallStatus which will be one of the following FAILED, FINISHED, INITIALIZED, INVALID, NOT_SUPPORTED, PARTIAL_SUCCESS, RUNNING, UNKNOWN