Undo mkl_umath patching in the test

Author: oleksandr-pavlyk

dpctl/tests/test_sycl_kernel_submit.py

@@ -18,6 +18,7 @@
 """
 
 import ctypes
+import sys
 
 import numpy as np
 import pytest
@@ -77,6 +78,14 @@ def test_create_program_from_source(ctype_str, dtype, ctypes_ctor):
     b_np = dpt.asnumpy(b)
     a_np = dpt.asnumpy(a)
 
+    if "mkl_umath" in sys.modules:
+        mod = sys.modules["mkl_umath"]
+        if hasattr(mod, "restore"):
+            # undo numpy umath patching to work around
+            # incorrect reference result on
+            # AMD EPYC 7763 64-Core Processor as observed in GH CI
+            mod.restore()
+
     for r in (
         [
             n_elems,