[Eager] Roll back legacy for fused_attention and fused_feedforward op test (#42719)

python/paddle/fluid/tests/unittests/test_fused_attention_op.py

@@ -26,7 +26,8 @@ from paddle import tensor
 from paddle.fluid import layers
 import unittest
 from op_test import OpTest
-from paddle.fluid.framework import default_main_program
+from paddle.fluid.framework import default_main_program, _enable_legacy_dygraph
+_enable_legacy_dygraph()
 
 default_main_program().random_seed = 42
 

python/paddle/fluid/tests/unittests/test_fused_feedforward_op.py

@@ -23,7 +23,8 @@ from paddle.nn.layer.norm import LayerNorm
 from paddle.nn.layer.common import Linear, Dropout
 import unittest
 from op_test import OpTest
-from paddle.fluid.framework import default_main_program
+from paddle.fluid.framework import default_main_program, _enable_legacy_dygraph
+_enable_legacy_dygraph()
 
 
 class TestFusedFFNOp(OpTest):