[SYCL] optimize wait() for in-order queue #18656
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in-order queue already trackes them through LastEvent
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Performance results are a bit noisy, but it seems there is some improvement on BMG: https://oneapi-src.github.io/unified-runtime/performance/?runs=Baseline_PVC_L0v2%2CBaseline_BMG_L0v2%2Cv2_wait_opt_pvc%2Cv2_wait_opt_bmg |
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This shortens the critical section for in-order and out-of-order cases and avoids taking the lock entirely is MNoEventMode is set.