Enable Scheduled Shutdown of Guacamole Windows VMs

[tim-p-allen]

As a user I want to specify a time that the VM will automatically shutdown each day to reduce costs.

This needs to be provided in the UI, hence the bundle template schema json will need updating, hence porter yaml, and terraform.

The terraform resource required can be found here.

https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/dev_test_global_vm_shutdown_schedule

Relates to #4186