Created by: zhouwei25

PR types

Function optimization

PR changes

APIs

Describe

Makes the Bind Method more automatic.

There these Change:

1. Replace the listed Tensor API by: linalg, math, logic, manipulation, search, stat, attribute modules which are related to Tensor operation, and the method of exhaustion is not suitable.
2. Fix some outdated documention of Tensor API, such as Tensor.detach.
3. Remove paddle.to_variable from 2.0Rc.
4. Add unittest coverage of all Tensor's API, whose total number is about 150.

The relevant documentation is:

https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/api/paddle/tensor/creation/Tensor_cn.html#tensor

https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/guides/tensor_introduction.html