message: add x-ms-enum to synapse
diff: "enum": [
  "default"
  ],
  + "x-ms-enum": {
  + "name": "BlobAuditingPolicyName",
  + "modelAsString": false
  + },
  "x-ms-parameter-location": "method"
  }
  ],
  "enum": [
  "default"
  ],
  + "x-ms-enum": {
  + "name": "BlobAuditingPolicyName",
  + "modelAsString": false
  + },
  "x-ms-parameter-location": "method"
  },
  {
  "enum": [
  "default"
  ],
  + "x-ms-enum": {
  + "name": "BlobAuditingPolicyName",
  + "modelAsString": false
  + },
  "x-ms-parameter-location": "method"
  }
  ],
  "enum": [
  "default"
  ],
  + "x-ms-enum": {
  + "name": "BlobAuditingPolicyName",
  + "modelAsString": false
  + },
  "x-ms-parameter-location": "method"
  },
  {
  