[Question]Azure Storage Account Blob Service have no metric for BlobProvisionedSize

### API Spec link

https://learn.microsoft.com/en-us/azure/azure-monitor/reference/supported-metrics/microsoft-storage-storageaccounts-blobservices-metrics

### API Spec version

2023-10-01

### Question/Query

According to link:
https://learn.microsoft.com/en-us/azure/azure-monitor/reference/supported-metrics/microsoft-storage-storageaccounts-blobservices-metrics

There is a metric name: BlobProvisionedSize in REST API.

While I call this API:

Method: HTTP Get:
URL: https://management.azure.com/subscriptions/166157a8-9ce9-400b-91c7-1d42482b83d6/resourceGroups/test-rg/providers/Microsoft.Storage/storageAccounts/leiteststorage000/blobServices/default/providers/Microsoft.Insights/metrics?interval=PT1H&metricnames=BlobCount,BlobCapacity,BlobProvisionedSize&aggregation=average,minimum,maximum&orderby=average asc&api-version=2023-10-01&metricnamespace=Microsoft.Storage/storageAccounts/blobServices&AutoAdjustTimegrain=True&ValidateDimensions=False

Will throw error :
{
"code": "BadRequest",
"message": "Failed to find metric configuration for provider: Microsoft.Storage, resource Type: storageAccounts/blobServices, metric: BlobProvisionedSize, Valid metrics: BlobCapacity,BlobCount,ContainerCount,IndexCapacity,Transactions,Ingress,Egress,SuccessServerLatency,SuccessE2ELatency,Availability"
}

### Environment

Postman

Start with the linked Azure Monitor supported-metrics specification and compare it with the provided REST API request and error response. Determine whether BlobProvisionedSize is incorrectly documented or missing from the service, then update the relevant REST specification or document the required service correction and verify the metric list.

Written by the indexing model from the issue text.