Queues creation should be supported for all available SYCL devices

[diptorupd]

It should be possible to create queues for all types of SYCL devices including cuda and host

[oleksandr-pavlyk]

This has been implemented:

(idp) [14:18:33 ansatnuc04 dpctl]$ SYCL_ENABLE_HOST_DEVICE=1 python -c "import dpctl; print(dpctl.__version__); print(dpctl.SyclDevice('host:0'))"
0.8.0a0+22.gb3dac2f
<dpctl.SyclDevice [backend_type.host, device_type.host_device,  SYCL host device] at 0x7f347c203170>

[oleksandr-pavlyk]

Same with queue:

(idp) [14:18:48 ansatnuc04 dpctl]$ SYCL_ENABLE_HOST_DEVICE=1 python -c "import dpctl; print(dpctl.__version__); print(dpctl.SyclQueue('host:0'))"
0.8.0a0+22.gb3dac2f
<dpctl.SyclQueue at 0x7f959251e550>

[diptorupd]

The feature works as long as the proper DPC++ tool chain is installed. Refer getting started guide.