[SYCL] Reintroduce barrier trivial event for empty in-order queue #20353

AlexeySachkov merged 1 commit intointel:sycl-rel-6_3intel/llvm:sycl-rel-6_3from

AlexeySachkov:private/asachkov/cherry-pick-20263AlexeySachkov/llvm:private/asachkov/cherry-pick-20263Copy head branch name to clipboard