Switch test_transformer to eager mode and fix roll error (#41548)

python/paddle/fluid/tests/unittests/dygraph_to_static/CMakeLists.txt

@@ -6,7 +6,7 @@ set(DY2ST_EAGER_TEST_ENVS ${GC_ENVS} FLAGS_enable_eager_mode=1)
 set(TEST_EAGER_OPS test_bmn test_break_continue test_ifelse test_loop test_mnist_amp 
     test_mnist_pure_fp16 test_mobile_net test_program_translator test_ptb_lm test_reinforcement_learning 
     test_resnet test_resnet_amp test_resnet_pure_fp16 test_se_resnet test_sentiment test_seq2seq 
-    test_tsm test_word2vec test_yolov3 test_bert test_cycle_gan test_lstm test_simnet)
+    test_tsm test_word2vec test_yolov3 test_bert test_cycle_gan test_lstm test_simnet test_transformer)
 list(REMOVE_ITEM TEST_OPS test_lac)
 # NOTE(Aurelius84): In case of Windows CI, if open ON_INFER, RWLOCK of Scope will
 # be removed and will cause some random failed in multi-thread.

python/paddle/tensor/manipulation.py

@@ -784,6 +784,8 @@ def roll(x, shifts, axis=None, name=None):
         axis = []
 
     if in_dygraph_mode():
+        if isinstance(shifts, paddle.Tensor):
+            shifts = shifts.cpu()
         return _C_ops.final_state_roll(x, shifts, axis)
 
     if _in_legacy_dygraph():