[bug] az iot hub state export fails while saving exported data to the file

[LucasWBritz]

Describe the bug
We executed the following command:
az iot hub state export --hub-name IotHubName --state-file ./IotHubName -state.json

The whole process took more than 3 hours, and +or- 53K devices got exported.
Once all of them were exported, a python exception was thrown while saving the state to the file.
All the exported data was lost.

Expected behavior
Exported data is saved.

Screenshots

[LucasWBritz]

Adding versions:

{
  "azure-cli": "2.71.0",
  "azure-cli-core": "2.71.0",
  "azure-cli-telemetry": "1.1.0",
  "extensions": {
    "azure-iot": "0.25.0",
    "ssh": "2.0.6"
  }
}

[vilit1]

Hi @LucasWBritz ,

We will look into allowing you to save a partial export to a file and also throwing the error more cleanly.