[Relax][PyTorch] Enable decomposition in all tests (#18464)

## Why

This is the last part of the migration. After this one, we could set
`run_ep_decomposition` default to true in our test

## How

Check and update the remaining tests

Author: guan404ming

tests/python/relax/test_frontend_from_exported_program.py

@@ -6435,7 +6435,14 @@ def main(
     batch = torch.export.Dim("batch")
     dynamic_shapes = {"x1": {0: batch}, "x2": {0: batch}}
 
-    verify_model(DynamicModel(), example_args, {}, Expected, dynamic_shapes=dynamic_shapes)
+    verify_model(
+        DynamicModel(),
+        example_args,
+        {},
+        Expected,
+        dynamic_shapes=dynamic_shapes,
+        run_ep_decomposition=True,
+    )
 
 
 def test_broadcast_to():
@@ -6919,7 +6926,7 @@ def main(
                 R.output(gv)
             return gv
 
-    verify_model(TensorNoneModel(), example_args, {}, Expected)
+    verify_model(TensorNoneModel(), example_args, {}, Expected, run_ep_decomposition=True)
 
 
 def test_gru():