Update test_export_fx_passes.py

pytorch/pytorch#124898 makes some changes to how `args` and `dynamic_shapes` are matched in `torch.export`, which will fail some XLA tests. This PR avoids those failures.

test/stablehlo/test_export_fx_passes.py

@@ -18,7 +18,7 @@ class ExportFxPassTest(unittest.TestCase):
 
   def test_decompose_dynamic_shape_select(self):
     args = (torch.rand((10, 197, 768)), 1, 0)
-    dynamic_shapes = ([{0: Dim("bs")}, None, None],)
+    dynamic_shapes = (({0: Dim("bs")}, None, None),)
     m = wrap_func_as_nn_module(torch.ops.aten.select.int)
     ep = export(m, args, dynamic_shapes=dynamic_shapes)
     out1 = ep.module()(*args)
@@ -55,7 +55,7 @@ def forward(self, x):
   def test_embedding_indices_flatten(self):
     args = (torch.rand((20, 768)), torch.randint(0, 15,
                                                  (3, 10)).to(torch.int64))
-    dynamic_shapes = ([None, {0: Dim("bs")}],)
+    dynamic_shapes = ((None, {0: Dim("bs")}),)
     m = wrap_func_as_nn_module(torch.ops.aten.embedding.default)
     ep = export(m, args, dynamic_shapes=dynamic_shapes)
     print(ep)