Disable Reduction/reduction_usm_dw.cpp until recent failure is investigated (#311)

Author: kbobrovs

SYCL/Reduction/reduction_usm_dw.cpp

@@ -2,6 +2,9 @@
 // RUN: %CPU_RUN_PLACEHOLDER %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
 // RUN: %ACC_RUN_PLACEHOLDER %t.out
+// TODO test disabled due to Jenkins testing failure on unrelated commit
+// failed on Linux level_zero only
+// UNSUPPORTED: linux && level_zero
 
 // This test performs basic checks of parallel_for(nd_range, reduction, func)
 // with reductions initialized with USM var. It tests only SYCL-2020 reduction