scripting: expose all qemu configs

[naveenrajm7]

Currently, only a couple of the qemu configs ( hypervisor & uefi ) are exposed to the scripting bridge.

Should be able to update the values of all qemu configs . Ex: TPMDevice

Example use case:
When one wants to create a VM for Windows 11, the default created VM through the scripting will not boot.
Because, the Windows VM creation workflow in the UTM UI will turn on few configs which will make the Windows setup to boot.
Specifically, the newly created VM through the windows flow will turn on RTCLocalTime, TPMDevice and UEFIBoot , all of which are false by default in a newly created VM and currently there is no way to change them via scripting.