provider/azurerm: Add support for EnableIPForwarding to (#6807)
provider/azurerm: Add support for EnableIPForwarding to (#6807)

`azurerm_network_interface`

As requested in #6803

```

```
abhijeetgaiha/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,thiagocaiubi/terraform-provider-azurerm,abhijeetgaiha/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,abhijeetgaiha/terraform-provider-azurerm,thiagocaiubi/terraform-provider-azurerm,sebastus/terraform-provider-azurerm,thiagocaiubi/terraform-provider-azurerm