* add mish operator and api

* remove redundant code and modify grad_atol of mish unittest

* modify mish code to be consistent with other activation implementation

* modify comment of mish

Cherry-pick PR #38014

* [Cherry-pick] Add the forward QR operator

* Add a check for multiplex op

* Improve multiplex based on reviews

* optimize backward (#37055)

* update

* update

* update

* modify code style

Co-authored-by: Nfeng_shuai <fengshuai03@baidu.com>

[CHERRY-PICK] Fix for matmul_v2 oneDNN op broadcasting when inputs dims have different lengths (#38733)

* fix for matmul_v2 broadcasting

* resolved conflicts

Fix error when calling sublayer's non-forward func in dy2stat
cherrypick: #37713、#37759、#37296、#38540、#37888

本PR修复了以下两个tensor切片索引bug：

1.修复Tensor索引赋值调用set_value op出现的显存泄露问题，该问题主要是由Inplace策略的使用不当导致，本PR中已完成修复。

2.修复使用多个None类型索引时结果维度异常的问题

* support data_format='NHWC' for prelu channel mode (#37019)

* support data_format='NHWC' for prelu channel mode

* fix prelu weight shape for NHWC of static mode (#38310)

[CustomOp]Add RWLock to protect loading module under multi-thread and multi-process (#38128) (#38271)

[Cherry-pick][CustomOp]Add RWLock to protect loading module under multi-thread and multi-process (#38128)

* fix clip_extra when QAT export model

* clear up unittes modify

Add python interface of subgraph: 1. all_sub_graphs() 2. get_sub_graph(idx)

Fix svd shape error.

修复tensor_shape_transformer中的错误。
之前在类似if len(paddle.shape(x)[0]) > 0中，paddle会被当做一个变量被传入convert_var_shape函数中

Issue37932 反馈 layer.to 不支持paddle.dtype类型的问题，新增了对这类型的支持。详情见：#38018
同时，也一并cherry-pick了遗漏的 PR 36779 的commit。

修改内容：
Cherry-pick #36779
cherrry-pick #38018

动转静时，将函数中的注释行进行删除。
有函数体外的注释行，使用gast库进行func2ast转换时会导致出错，本PR之后将注释行（#开头的行）进行了删除

优化layer.to实现逻辑，相关pr：
Remove additional warnning in layer.to ( #36700)
Refine param conversion logic in layer.to ( #36862)
Fix Layer.to() of device bug ( #37156)

* fix_ele_convert: IElementWiseLayer can broadcast

* fix_ele_convert

fix: when ceil_model==true && Padding_algo!=SAME, (x-size)/stride != int, this convert is wrong (#37929) (#38033)
Co-authored-by: Nfeng_shuai <fengshuai03@baidu.com>

Polish for zip in dy2stat

Fix default behavior if block=None in static mode (#37827)

Fix cflags D_GLIBCXX_USE_CXX11_ABI takes no effect problem in customized op

* py2 to py3 bug and iface fix for pslib (#36102)

* avoid setting logging.basicConfig (#37031)