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Describe the current behavior / 问题描述 (Mandatory / 必填)

MoeGatingTopK A3实现缺少支持norm_type=2。
当网络中使用该场景时，由于不支持，只能走小算子实现，导致性能劣化

Environment / 环境信息 (Mandatory / 必填)

ascend910b/ascend910_93

Steps to reproduce the issue / 重现步骤 (Mandatory / 必填)

在A2/A3设备上执行算子，属性norm_type选择2

Describe the expected behavior / 预期结果 (Mandatory / 必填)

MoeGatingTopK的A3部分支持norm_type=2

Related log / screenshot / 日志 / 截图 (Mandatory / 必填)

NA

Special notes for this issue/备注 (Optional / 选填)