[SYCL] Align group and sub_group with SYCL 2020 (#22888)
Addresses https://github.com/intel/llvm/issues/22880
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Kornev, Nikita <nikita.kornev@intel.com>
