【Prim】Enhance gather vjp (#50786)

* tmp gather vjp

* support gather

* remove useless code

* fix compiling error

* fix ut

* add eager test

* add eager test

* add seed

* fix cpu error

* fix transpose op compat

* remove tensor index case

* fix prim_cinn

* fix ut

* add gather composite

paddle/phi/api/yaml/legacy_backward.yaml

@@ -543,6 +543,7 @@
   kernel :
     data_type: x
     func : gather_grad
+  composite : gather_grad(x, index, out_grad, axis, overwrite)
   no_need_buffer : x
 
 - backward_op : group_norm_grad

python/paddle/fluid/tests/unittests/prim/prim/vjp/static/test_comp_gather_grad.py

@@ -113,9 +113,15 @@ class TestGatherGradComp(unittest.TestCase):
 
     def test_cinn(self):
         paddle.disable_static()
+        use_cinn = True
+        if isinstance(
+            framework._current_expected_place(), framework.core.CPUPlace
+        ):
+            # TODO(jiabin): CINN will crashed in this case open it when fixed
+            use_cinn = False
         dy_res = self.train(use_prim=False, use_cinn=False)
-        # TODO(jiabin): CINN will crashed in this case open it when fixed
-        comp_st_cinn_res = self.train(use_prim=True, use_cinn=False)
+
+        comp_st_cinn_res = self.train(use_prim=True, use_cinn=use_cinn)
 
         for i in range(len(dy_res)):
             np.testing.assert_allclose(