Revert "cherry picked windows patches."

Add TESTING_DEBUG_MODE to support debug info in daily CI test

fix pserver weight decay multi inputs

fix test_analysis_predictor

Add reorg op

Make OpHandle/VarHandle and ir::Node works cleaner

test=develop

test=develop

cherry picked windows patches.

"fix comment"

optimize pyreader

test=develop

* fix selected_rows bug
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* refine cos_sim
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fix mac

Delete buggy selected_rows functor

test=develop

add vadd, vaddrelu jitcode

fix run error on mac

test=develop

test=develop

recordio is not the official API in Fluid 1.0. Remove unittests for it.

test=develop

`cwd` was not set before when get commit SHA. The default `cwd` is the current build directory. However, the build directory might not be the subdirectory of source. The `git` command will fail when that happened.

test=develop

Dry run tests will skip `Op.Run` and just perform job scheduling. It helps to analysis dead lock in PE.

test=develop

test=develop

refine analysis_resnet50_tester

clean rpc server profiler

test=develop

Fix googlenet bug with rule

fix_recordio_internal_link

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*  fix mkdir conflict

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Optimize thread pool

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* add fp16 backward support
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* add sum_op fp16 test

* disable test_dist_save_load
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* add check_grad for sum

* add unit test for softmax_grad fp16
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* add scale_op unit test

* add mul_grad_op unit test for fp16

* add cross_entropy_grad and eman_grad unit test for fp16
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* fix cross_entropy unit test

* add pool2d fp16 unit test

* refine conv2d fp16 unit test
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* refine activation unit test
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* fix ci
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* follow zhihong's comment, copy from https://github.com/PaddlePaddle/Paddle/pull/12796
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