!10863 add dot opt into composite.__init__.py

From: @xutianming1985
Reviewed-by: @liangchenghui,@c_34
Signed-off-by: @liangchenghui

mindspore/ops/composite/__init__.py

@@ -27,7 +27,7 @@ from .multitype_ops.add_impl import hyper_add
 from .multitype_ops.ones_like_impl import ones_like
 from .multitype_ops.zeros_like_impl import zeros_like
 from .random_ops import normal, laplace, uniform, gamma, poisson, multinomial
-from .math_ops import count_nonzero, tensor_dot, batch_dot
+from .math_ops import count_nonzero, tensor_dot, dot, batch_dot
 from .array_ops import repeat_elements, sequence_mask
 
 
@@ -53,6 +53,7 @@ __all__ = [
     'clip_by_global_norm',
     'count_nonzero',
     'tensor_dot',
+    'dot',
     'batch_dot',
     'repeat_elements',
     'sequence_mask']

tests/st/ops/cpu/test_dot_op.py

@@ -27,7 +27,7 @@ context.set_context(mode=context.GRAPH_MODE, device_target="CPU")
 
 class NetDot(nn.Cell):
     def construct(self, x, y):
-        return C.math_ops.dot(x, y)
+        return C.dot(x, y)
 
 
 @pytest.mark.level0