[AMD] Re-enable overflow test in test_reduce_layouts (#5233)

triton-lang/triton#5153 fixed
the issue; but we missed enabling one of the disabled
case.

Author: antiagainst

python/test/unit/language/test_core.py

@@ -2666,8 +2666,6 @@ def test_reduce_layouts(M, N, src_layout, axis, epilogue_kind, dtype_str, add_ov
         pytest.skip("Skipping because tensor shape is smaller than M(f)maLayout instr_shape")
     if is_hip() and isinstance(src_layout, MfmaLayout) and ((M, N) == (128, 128)):
         pytest.skip("Skipping test because it runs out of shared memory")
-    if add_overflow_check is True and is_hip():
-        pytest.skip("overflow check disabled on HIP while fixing issues")
     if reduce_op == "sum" and dtype_str == "float16" and M * N > 1024:
         pytest.skip("Skipping sum reduction on float16 due to accuracy issues")