azure kubernetes terraform - create Azure AD Group for AKS Admins terraform resource

aks-administrators-azure-ad.tf

resource "azuread_group" "aks_administrators"{
 name = "${azurerm_resource_group.aks_rg.name}-cluster-administrators"
 description = "Azure AKS Kubernetes administrators for the ${azurerm_resource_group.aks_rg.name}-cluster."
}