Fixed an issue with XPU skip so the test_decompose_mem_bound_mm.py suite can be ran correctly (#153245)

Fixes #153239

Replaced custom decorator with the common one. Although the better way to skip the whole suite would be to add it to skip list in run_test.py

Pull Request resolved: https://github.com/pytorch/pytorch/pull/153245
Approved by: https://github.com/guangyey, https://github.com/EikanWang, https://github.com/jeffdaily

test/inductor/test_decompose_mem_bound_mm.py

@@ -1,6 +1,7 @@
 # Owner(s): ["module: inductor"]
 
 import logging
+import unittest
 
 import torch
 import torch._inductor
@@ -12,7 +13,7 @@ from torch.testing import FileCheck
 from torch.testing._internal.common_utils import (
     instantiate_parametrized_tests,
     parametrize,
-    skipIfXpu,
+    TEST_XPU,
 )
 from torch.testing._internal.inductor_utils import GPU_TYPE, HAS_CUDA
 from torch.testing._internal.triton_utils import requires_gpu
@@ -48,9 +49,10 @@ class MyModule3(torch.nn.Module):
 
 
 @requires_gpu
-@skipIfXpu(
-    msg="Intel GPU has not enabled decompose_mem_bound_mm PASS in "
-    "torch/_inductor/fx_passes/decompose_mem_bound_mm.py"
+@unittest.skipIf(
+    TEST_XPU,
+    "Intel GPU has not enabled decompose_mem_bound_mm PASS in "
+    "torch/_inductor/fx_passes/decompose_mem_bound_mm.py",
 )
 @torch._inductor.config.patch(
     post_grad_fusion_options={