* remove intype arg in cast kernel

* modify conj config in api.yaml by dictionary order

* rm unused code in cast_kernel.cu

* rename to api to copy_to

* revert needless change

* polish format

* rename cuda to gpu

* revert CMake change

* resolve conflit

* rename other cuda to gpu

* poish details

* unify device context entrance

* move all_context include to header

* polish cmake relay for device_context

* fix npu compile failed

* fix npu compile failed

* refine structure for cuda and rocm

* update

* update

* update

* update

* add cuda implement of cast kernel

* remove bfloat16 when defined paddle_with_hip