[BugFix] Fix load ckpt weight for amp 02 #2479
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PR types
Bug fixes
PR changes
Models
Description
Fix load ckpt weight for amp 02
在 amp-o2功能开发过程中，为了支持指定网络存储数据类型的功能，添加state_dict hook功能，但是在Layer的set_state_dict是通过state_dict获取网络参数并加载的，hook接口的存在导致 set_state_dict无法加载到原本网络参数。
导致参数加载出现问题。本PR不再使用 save_dtype 选项。
PaddlePaddle/Paddle#43407