Replace sycl_ext_oneapi_max_work_group_query with sycl_khr_max_work_group_queries

[VerenaBeckham]

As I understand it, Intel's sycl_ext_oneapi_max_work_group_query extension has been replaced by sycl_khr_max_work_group_queries. I don't see this change in dpc++ yet.

Are there any plans to do this?

[dyniols]

Yes, it's not implemented yet. However as far I know the work to support the khr extension has started: #22921
@HPS-1 @dm-vodopyanov @gmlueck FYI