Add "allowEdit" field to end user

[dmgaldi]

Plumbing the allowEdit field from database to response.

Testing

• GET https://edadata-dev.local.apidb.org:8443/dataset-end-users
• Verified response of my test request that I denied:

  {
          "user": {
              "userId": 400455250,
              "firstName": "Daniel",
              "lastName": "Galdi",
              "organization": "Unaffiliated",
              "email": "dmgaldi@gmail.com"
          },
          "datasetId": "DS_a885240fc4",
          "startDate": "2023-06-07T04:00:00.000Z",
          "duration": -1,
          "restrictionLevel": "public",
          "purpose": "testing",
          "disseminationPlan": "testing",
          "approvalStatus": "denied",
          "allowEdit": true
  }