Disable esimd_emulator for the test that fails on atomic xchg operation

Author: fineg74

SYCL/ESIMD/dword_atomic_smoke.cpp

@@ -8,7 +8,7 @@
 // This test checks DWORD atomic operations.
 //===----------------------------------------------------------------------===//
 // REQUIRES: gpu
-// UNSUPPORTED: cuda || hip
+// UNSUPPORTED: cuda || hip || esimd_emulator
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out