Add support for dpctl.SyclDevice.partition_max_sub_devices

Requested by @dmishura

The property would expose `uint32_t sycl::device::get_info<sycl::info::device::partition_max_sub_devices>()` that gives "the maximum number of sub-devices that can be created when this SYCL device is partitioned".

This can be used to differentiate between GPUs that support partitioning and those that do not.


















































