BMSUserErrorInvalidInput in az dataprotection backup-instance adhoc-backup for Kubernetes Service

### Describe the bug

I am using Azure Kubernetes Service and Azure Backup Vault to generate regular backups of my cluster.  

I am now trying to script the creation of an On-demand backup using Azure CLI. However, after thoroughly validating all inputs, I keep getting a BMSUserErrorInvalidInput. Using Az-PowerShell and the REST API led to similar results, even when it works correctly whenever I trigger it from the portal.

### Related command

`az dataprotection backup-instance adhoc-backup --rule-name "Default" -n $BACKUP_INSTANCE_NAME -g $RESOURCE_GROUP_NAME --subscription $SUBSCRIPTION_ID -v $BACKUP_VAULT_NAME`

### Errors

```sh
(BMSUserErrorInvalidInput) The user's input for the call is incorrect
Code: BMSUserErrorInvalidInput
Message: The user's input for the call is incorrect
Additional Information:Type: UserFacingError
Info: {
"message": " The user's input for the call is incorrect",
"recommendedAction": [
"Please check the required inputs"
],
"code": "BMSUserErrorInvalidInput",
"target": "",
"isRetryable": false,
"isUserError": false,
"properties": {
"ActivityId": "xxx-xxx-xxx-xxx-xxx"
}
}
```

### Issue script & Debug output

(Tomorrow I will update with the debug logs because I'm now getting this error `The operation is blocked, as a security precaution, since multiple attempts were made beyond an internal limit.`)

### Expected behavior

Successfully triggers and creates an Azure Kubernetes Service backup, which works fine when triggered from the portal.

### Environment Summary

```sh
{
"azure-cli": "2.60.0",
"azure-cli-core": "2.60.0",
"azure-cli-telemetry": "1.1.0",
"extensions": {
"account": "0.2.5",
"azure-iot": "0.17.0",
"dataprotection": "1.4.0"
}
}
```

### Additional context

``` terraform
resource "azurerm_data_protection_backup_policy_kubernetes_cluster" "this" {
name = "bup-pol-${var.environment}-${var.location}"
resource_group_name = var.resource_group_name
vault_name = azurerm_data_protection_backup_vault.this.name

backup_repeating_time_intervals = ["R/2024-04-24T05:00:00+00:00/P1D"]

retention_rule {
name = "Custom"
priority = 25

life_cycle {
duration = "P14D"
data_store_type = "OperationalStore"
}

criteria {
absolute_criteria = "FirstOfDay"
}
}

default_retention_rule {
life_cycle {
duration = "P360D"
data_store_type = "OperationalStore"
}
}
}
```