变更摘要

本次变更为 AvgPool3D 和 AvgPool3DGrad 两个算子补充了数据类型推导（InferDataType）能力。AvgPool3D 将输出数据类型设置为与输入 x 一致；AvgPool3DGrad 则将输出数据类型设置为与梯度输入（索引 1）一致。同时为两个算子新增了覆盖 FP16、FP32、BF16 三种数据类型的单元测试。

主要改动

• AvgPool3D 新增 InferDataTypeForAvgPool3D 函数：从输入 x（索引 0）获取数据类型，直接透传至输出，并在 IMPL_OP_INFERSHAPE 中通过 .InferDataType() 注册该推导函数。
• AvgPool3DGrad 新增 InferDataTypeForAvgPool3DGrad 函数：从梯度输入（索引 IDX_1）获取数据类型，设置为输出数据类型，并在 IMPL_OP_INFERSHAPE 中通过 .InferDataType() 注册。
• 新增单元测试覆盖多精度场景：为 AvgPool3D 和 AvgPool3DGrad 各新增三个测试用例（InferDataTypeFP16、InferDataTypeFP32、InferDataTypeBF16），验证推导结果与预期数据类型一致。

代码审查

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