* Add function to disable paddle signal handler

Paddle used google::InstallFaultSignalHandler to handle selected system signals,
mainly for debugging and bug report purposes.

However, this can be conflicted with other python packages whoever captures similar signals.
Such python package involves tvm and more

To resolve this issue, we support a function to disable signal handler

* Remove signal test from WIN32 platform

* Remove redundant return from disable_signal_handler() function

* Add detailed messages to en_doc

* fix flatten infershape; test=develop

* fix flatten infershape; test=develop

SliceGradKernel的need_pad_num == 0判断有问题，直接跳过导致没有分配合适的空间，删去该判断逻辑后运行就正常了。

 [cherry-pick][Dy2Stat]supplet several interface of static Variable to consistent with dygraph Tensor (#33330) #34401 

As the title

[cherry-pick][Dy2Stat]supplet several interface of static Variable to consistent with dygraph Tensor (#33330)

[Dy2Stat]Support non-tensor type in input_spec

* fix DataLoader memory leak. test=develop

* fix unittest abort. test=develop

* enable test_dataloader_dataset & skip GPU tensor break. test=develop

* fix the order of unfold parameters (#34156)

* fix the order of unfold parameters

* fix the order of unfold parameters (#34156)

* fix the order of unfold parameters

* fix unfold

* Update paddle_build.bat to remove op grad when build windows inference lib (#33800)

1. check status of remove op grad shell scripts
2. Update paddle_build.bat to remove op grad when build windows inference lib
3. add inference demo test after build finish

* Update paddle_build.sh for remove op grad when compile c++ inference lib (#33798)

* fix zip inference library bug (#34025)
Co-authored-by: Zhou Wei <1183042833@qq.com>

Add more information to tensor.grad warning message.

* support Nest sequtial container

* rename model path

* update readme test=document_fix

* update while loop docs test=document_fix

修复《jit.save在Mac系统上保存的模型，在Linux平台上无法对模型进行重训练》的问题。

原始PR： #34027

* Save all the information of 'ParamBase' in 'Layer'. (#33500)

* Save all the information of 'ParamBase' in 'Layer'.

* edit unittest

* delete the function of saving layer object. (#33697)

* delete the function of saving layer object.

* edit doc of paddle.save/load and polish error message

* update xpu cmake for kunlun (#33328)

* xpu support amp (#33809)

* fix bug DLTP-31078 (#33877)

* update xpu cmake (#33906)

* [xpu] add dropout & amp ops in xpu place (#33891)
Co-authored-by: NTTerror <tangzhiyi11@users.noreply.github.com>

[Cherry-pick] Up cxx11 check to cxx14 #34034

[oneDNN] Fix to #33282 , added support of X input broadcasting to oneDNN elementwise ops (#33549) (#33845)

* - fix to #33282

* - Increased threshold for elementwise_mul_bf16 grad

* -disabled faulty UT

* - fix to approval

* del python2 code

* cherry-pick 33556

Bug fixes， [Cherry-pick][Dy2Stat] Fix unique_name in create_static_variable_gast_node (#33963)

将关于approve相关的修改cherry-pick到2.1分支

cherry-pick #33818

[Dy2Stat] Support Python3 type hint (#33745)

fix bug when the cuda kernel config exceeds dims max

cherry-pick Specify gast version in requirements.txt

解决windows cmd和powershell显示乱码的问题