* [Dy2Stat] Add test for ptb model. (#24076)

* [Dy2Stat] Add test for ptb model. test=develop

* Simplify code for gast.If in is_control_flow_to_transform. test=develop

* Move IsControlFlowVisitor to file utils. test=develop

* Don't use convert_call for build-in func in CallTransformer. test=develop

* Optimize api is_control_flow_to_transform. test=develop

* Polish the document of IsControlFlowVisitor. test=develop

* Use declarative instead of dygraph_to_static_func. test=develop

* [dy2static] Add print transformer and unify print format (#24068)

* add print transformer & unify print format, test=develop

* remove using of dygraph_to_static_func, test=develop

* remove python stdout capture, test=develop

* fix compatibility problems for PY2, test=develop

* fix detail error, test=develop

* fix type analysis bug, test=develop

* fix print tuple compatible error in PY2, test=develop

* replace get_func to declarative, test=develop

* fix detail bug, test=develop

* fix some detail problems, test=develop

* change visit_call in print transformer, test=develop

* [dy2static] Support for static graph training with @declarative decorator (#24259)

* support to train in static

* support to independent decorator

* remove in_dygraph_mode condition in ProgramTranslator

* fix import param_guard and add train/eval test=develop

* Modify into ShareVarsFromScope and rm __all__ in partial_program test=develop

* [Dy2Stat] Optimize loop cond (#24049)

* Simplify code for gast.If in is_control_flow_to_transform.
* Move IsControlFlowVisitor to file utils. 
* Don't use convert_call for build-in func in CallTransformer. 
* Optimize api is_control_flow_to_transform. 
* Polish the document of IsControlFlowVisitor.

* revert modification from #24259

* [dy2stat]Support save_inference_model in program_translator (#24353)

* support save_inference_model in program_translator test=develop

* fix compatibility with OrderedDict.values() in python3 test=develop

* synchronized random_seed test=develop

* Polish Error Message test=develop

* Fix bug with `if Tensor` in is_control_flow (#24433)

* fix bug with `if Tensor` in is_control_flow test=develop

* remove continue test=develop

* Revert "[dy2static] Add print transformer and unify print format (#24068)"

This reverts commit 09dd0190.

* Revert "[dy2static] Add print transformer and unify print format (#24068)"

This reverts commit 09dd0190.

* fix sample code in sava_inference_model test=develop
Co-authored-by: Nliym27 <33742067+liym27@users.noreply.github.com>
Co-authored-by: NChen Weihang <chenweihang@baidu.com>