fix dygraph save load

test=release/1.4

disable runtime_context_cache pass by default

test=develop

* Merge conflicts with 1.4

* Resolve conflicts

* Fix some comments

test=release/1.4

* Fix py3 error

test=release/1.4

test=release/1.4

* Check some shapes only in runtime

test=release/1.4

* Follow review comments

test=release/1.4

* Update API spec

merge pull request 16907 cherry-pick

test=develop

cherry-pick #16898 and #16902 to release/1.4

Merge pull request #16797 from phlrain/fix_split

 test=Release/1.4

fix logical op infershape

* Security issue (#16774)

* disable memory_optimize and inpalce strategy by default, test=develop

* fix security issue
http://newicafe.baidu.com:80/issue/PaddleSec-3/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-8/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-12/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-32/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-35/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-37/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-40/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-43/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-44/show?from=page
http://newicafe.baidu.com:80/issue/PaddleSec-45/show?from=page

test=develop

* revert piece.cc, test=develop

* adjust api.cc,test=develop

* fix overflow by int32 mul test=develop (#16794)

* fix overflow by int32 mul test=develop

* fix reference nullptr

* fix codestyle test=develop

* modify to point in ContextProjectFunctor test=develop

* modify to point in ContextProjectFunctor test=develop

* modify . to -> test=develop

* test=release/1.4 cherry-pick (#16783) (#16794) (#16774)
fix security issue

test=release/1.4

Merge pull request #16787 from phlrain/fix_concat_shape_2

Merge pull request #16799 from phlrain/sigmoid_corss_entropy_support_…

Merge pull request #16840 from phlrain/fix_shape_check_many

Pick many infer fix

Infer shape of pad_op pad_constant_like_op for version 1.4.0

[Cherry-pick] batch_norm and cos_sim infershape

test=develop

test=develop

Merge pull request #16798 from phlrain/softmax_cross_support_high_rank

[Cherry pick] modified infer shape

[cherry-pick] infer shape: grid_sampler, kldiv_loss, spectral_norm, interpolate

[cherry-pick]polish doc for uniform_random and multi_box_head

[Cherry-pick] polish yolov3_loss annotation

add continuous value model op

refine roi align infer shape. test=release/1.4

* fix infershape in runtime

* fix infershape in runtime
test=develop

* fix infershape in runtime

* scatter_op bug fix, test=develop

* scatter_op bug fix, test=develop

* scatter_op bug fix, test=develop

separate runtime infershape

Fix merge_lod_tensor_op infer shape

Fix infer shape of split lod tensor op

fix teacher_student op infer

Fix sum infershape issue

Fix bpr loss

Fix conv_shift_op infershape