support cast op backward refuse forward and fix some bugs#46173
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zyfncg
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Sep 19, 2022
Charles-hit
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Sep 19, 2022
…le#46173) * support cast op backward refuse forward * Fix the bug of high order unit test framework
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本次pr主要完成了以下两个工作：
1.基于yaml自动代码生成支持cast op 反向复用前向实现无限阶并且添加二三阶单测
2.修复高阶单测框架bug，在测试时数据准备阶段应该设置output的stop_gradient为False，否则可能会导致单测框架报错（主要原因是因为静态图下stop_gradient传递性未对齐动态图）。
报错信息如下：