provider/azurerm: use configured environment for storage clients (#11159)
provider/azurerm: use configured environment for storage clients (#11159)

This fixes storage related operations for all environments outside of the public
Azure cloud, tested by deploying all storage resources in a German subscription.
thiagocaiubi/terraform-provider-azurerm,abhijeetgaiha/terraform-provider-azurerm,abhijeetgaiha/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,thiagocaiubi/terraform-provider-azurerm,thiagocaiubi/terraform-provider-azurerm,abhijeetgaiha/terraform-provider-azurerm