Examples should not be using deprecated host devices

[oleksandr-pavlyk]

Host device is not mandated by SYCL 2020 spec. Support for host device has been removed in DPC++ 2023, and has been removed from dpctl in https://github.com/IntelPython/dpctl/pull/1028

Example for device querying should be modified to avoid using removed functionality: https://github.com/IntelPython/DPEP/blob/main/examples/04-dpctl_device_query.py#L33

[samaid]

Thank you for catching this. Will get it updated