[AMD] Disable overflow check while fixing issues (#5078)

These two tests causes significant CI runtime increase (10x)
so disabling them to unblock while figuring out issues.

python/test/unit/language/test_core.py

@@ -2547,6 +2547,8 @@ def kernel(X, Y, N, BLOCK_M: tl.constexpr, BLOCK_N: tl.constexpr, NUM_PID_N: tl.
 @pytest.mark.parametrize("axis", [0, 1])
 @pytest.mark.parametrize("add_overflow_check", [False, True])
 def test_scan_layouts(M, N, src_layout, axis, add_overflow_check, device, tmp_path: pathlib.Path):
+    if add_overflow_check is True and is_hip():
+        pytest.skip("overflow check disabled on HIP while fixing issues")
 
     overflow_check = """
         %17 = arith.extsi %arg2 : i32 to i64
@@ -2650,6 +2652,8 @@ 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")