Support sycl_ext_intel_queue_index extension

[kbenzie]

intel/llvm#7599 introduces support for the sycl_ext_intel_queue_index by adding an alternative signature of piQueueCreate which allows specifying a null terminated array of queue properties to enable the application to specify the desired queue index for devices which support it. Refer to the extension specification for more detail, and the PR for implementation details.

To resolve this ticket the UR spec should be updated to enable this extension.

[aelovikov-intel]

It's needed not only to support the extension, but to support current SYCL implementation at all as the new API is used unconditionally.

[kbenzie]

@aelovikov-intel noted, in that case when added to Unified Runtime we will ensure it is not optional.