From: @xuguoyang5566
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @huangbo77
Reviewed-by: @wuxuejian,@oacjiewen
Signed-off-by: @wuxuejian

From: @TFbunny
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @shibeiji
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @wuxuejian

From: @he-botao
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by:

From: @yuanwei66
Reviewed-by: 
Signed-off-by:

Add L2NormalizeGradCPUKernel 修改测试用例误差判断方式

Add L2NormalizeGradCPUKernel 注释调试信息

Add L2NormalizeGradCPUKernel 修改反向算子的计算公式

Add L2NormalizeGradCPUKernel 去掉 float16 的注册

Add L2NormalizeGradCPUKernel 使用相对误差

Add L2NormalizeGradCPUKernel 更新反向公式

Add L2NormalizeGradCPUKernel 删除调试信息

清除告警

Add L2NormalizeGradCPUKernel 添加测试用例

Add L2NormalizeGradCPUKernel 删除多余的函数

Add L2NormalizeGradCPUKernel 修改注释中的时间

Add L2NormalizeGradCPUKernel 格式化代码

Add L2NormalizeGradCPUKernel 格式化代码，修改 cpplint 问题

Add L2NormalizeGradCPUKernel 修改 cpplint，pylint 问题

Add L2NormalizeGradCPUKernel 修改求导函数，与 GPU 和 Ascend 保持一致。
修改后的公式在数学意义上有问题，但已经和武雪剑对齐，认为没有影响，没有必要要求 GPU 和 Ascend 修改代码。

Add L2NormalizeGradCPUKernel 精简测试用例

From: @woshixiaoli
Reviewed-by: @liangchenghui,@chujinjin
Signed-off-by: @liangchenghui

From: @chenlei_autodiff
Reviewed-by: 
Signed-off-by:

From: @fangzehua
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @wuxuejian

From: @wenfangpei
Reviewed-by: @gaoxiong1,@anyrenwei
Signed-off-by: @anyrenwei

From: @wenfangpei
Reviewed-by: @anyrenwei,@gaoxiong1,@gaoxiong1
Signed-off-by: @anyrenwei

From: @lingyunli63
Reviewed-by: @gaoxiong1,@ckey_dou
Signed-off-by: @ckey_dou

From: @wenfangpei
Reviewed-by: @dayschan,@ckey_dou,@gaoxiong1
Signed-off-by: @gaoxiong1

From: @lingyunli63
Reviewed-by: @gaoxiong1,@ckey_dou
Signed-off-by: @ckey_dou

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @xuguoyang5566
Reviewed-by: 
Signed-off-by:

From: @looop5
Reviewed-by: @gaoxiong1,@gaoxiong1,@dylangeng
Signed-off-by: @dylangeng

From: @chenlei_autodiff
Reviewed-by: 
Signed-off-by:

refactor CanActivateAtomicAdd

use smart pointer

From: @zengzitao
Reviewed-by: @gaoxiong1
Signed-off-by:

From: @lingyunli63
Reviewed-by: 
Signed-off-by:

From: @ZhengQihao3f3f3f
Reviewed-by: 
Signed-off-by:

From: @wangyanling10
Reviewed-by: 
Signed-off-by: