* add visit_place to phi/core/utils

* remove reference to operator.h in phi/kernels/funcs/math_function.h

* update data type from framework.proto to phi

* fix enforce error in fluid

* perfect copy

* deal with conflict

* deal with conflict

* fix compile bugs

* fix unittest bugs

* change code format

* deal with conflict

* modify code by review

* fix ce bugs

* fix ce bugs

* add lo

* perfect code format

* deal with conflicts

* rename scalar_array to int_array

* update cmake

* fix conflict

* remove useless log

* [Phi] Migrate strided_slice into Phi

* [Phi] Migrate strided_slice into Phi

* fix compilation problem

* move set_value_grad kernel form fluid to phi

* add unittest for passing coverage ci