Can't download images in Maas 3.5.0 in HA mode with 3 nodes

[Jacopo Rota]

In Maas 3.5.0 in HA mode with 3 nodes the image sync is broken.

How to reproduce: setup Maas with 3 nodes and try to download some images.

From my reproducer:
By looking at the sync-boot-resource workflow some child workflows like `bootresource-download:497bc88ad4e5` are started twice and then it is terminated with the error `terminated by new runID: 6cd76c58-7a56-498e-86d3-53364ddacec5`
when this happens the top level `sync-boot-resources` workflow fails with
```
{
  "type": "workflowExecutionFailedEventAttributes",
  "failure": {
    "message": "Child Workflow execution terminated",
    "cause": {
      "message": "Terminated",
      "terminatedFailureInfo": {}
    },
    "childWorkflowExecutionFailureInfo": {
      "namespace": "default",
      "workflowExecution": {
        "workflowId": "bootresource-download:497bc88ad4e5",
        "runId": "3908106b-b8bc-49ae-ae74-c57512643a7b"
      },
      "workflowType": {
        "name": "download-bootresource"
      },
      "initiatedEventId": "117",
      "startedEventId": "151",
      "retryState": "RETRY_STATE_NON_RETRYABLE_FAILURE"
    }
  },
  "retryState": "RETRY_STATE_RETRY_POLICY_NOT_SET",
  "workflowTaskCompletedEventId": "209"
}
```

in the run id `3908106b-b8bc-49ae-ae74-c57512643a7b` I see

```
[
  "terminated by new runID: 6cd76c58-7a56-498e-86d3-53364ddacec5"
]
```

and in the run id `6cd76c58-7a56-498e-86d3-53364ddacec5` I see
```
{
  "type": "workflowExecutionTerminatedEventAttributes",
  "reason": "by parent close policy",
  "identity": "temporal-sys-parent-close-policy-workflow"
}
```
in the run id `3908106b-b8bc-49ae-ae74-c57512643a7b` I see

```
[
  "terminated by new runID: 6cd76c58-7a56-498e-86d3-53364ddacec5"
]
```

and in the run id `6cd76c58-7a56-498e-86d3-53364ddacec5` I see
```
{
  "type": "workflowExecutionTerminatedEventAttributes",
  "reason": "by parent close policy",
  "identity": "temporal-sys-parent-close-policy-workflow"
}
```

in the run id `3908106b-b8bc-49ae-ae74-c57512643a7b` I see

```
[
  "terminated by new runID: 6cd76c58-7a56-498e-86d3-53364ddacec5"
]
```

it's like the child workflow is started twice and since the first one is cancelled then the entire workflow is terminated

The two child workflows have the same parent but they are in 2 different task queues (the 2 regions that need to download the images from the region that started the sync-boot-resource s).

This is because the 2 child workflows are sharing the same workflow id, but it must be unique within the temporal namespace unless specified differently using a Reuse Policy https://docs.temporal.io/workflows#workflow-id