[Fix] fix phi extension header error when compiling custom device

[qili93]

PR types

Bug fixes

PR changes

Others

Description

修复 #57785 引入的 extension.h 的头文件问题

文件栈如下，kernels.h 是由Paddle自动生成，会自动引入所有 paddle/phi/include/ 目录下的kernel头文件

copysign_kernel.h 中引入了 elementwise_base.h，这里代码有对 set_lod 这样定义在 dense_tensor_impl.inl 中而不是 dense_tensor.h 中的定义进行引用，外部调用 extension.h 头文件就会引发找不到 set_lod 定义的错误，因此 elementwise_base.h 这样头文件的引入需要放在kernel.cc/kernel.cu文件中，不可以放到 kernel.h的头文件中。

2024-01-15 16:46:16 In file included from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/kernels/funcs/eigen/common.h:20,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/kernels/funcs/common_shape.h:18,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/kernels/funcs/elementwise_base.h:21,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/kernels/funcs/broadcast_function.h:18,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/kernels/copysign_kernel.h:18,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/include/kernels.h:65,
2024-01-15 16:46:16                  from /opt/py39/lib/python3.9/site-packages/paddle/include/paddle/phi/extension.h:11,

后续为了避免此类情况，增加一个 header_test 的测试

1. 在develop分支，没有修复copysign_kernel代码的情况下会报编译错误如下

2. 在修复了 copysign_kernel 代码之后可以正常编译和执行单测如下

Pcard-77889

[paddle-bot]

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[ronny1996]

LGTM