* Fix copy elision warning

* Remove redundand code

* Modify H2D and D2H as kQueue::Sync

* fix interface error

* format code

* format interface

* polish interface

* Remove std::memory_order

* modify into SpinLock

* remove fetch_context_pool_

* fix comment

* modify into WorkQueueGroup

* refine code

* fix pointer

* fix paddle_enforce

* split into AsyncWorkQueue

* polish code

* specify std::memory_relax

* fix atomic fetch_sub

* fix num_thread

Intergrate StandaloneExecutor in Static.Executor Interface with FLAGS_USE_STANDALONE_EXECUTOR (#35628)

* Intergrate StandaloneExecutor in Static.Executor Interface with FLAGS_USE_STANDALONE_EXECUTOR

* Enhance unittest and clean code in StandaloneExecutor

* polish unittest

* refactor new executor, test=develop

* refine, test=develop

* refine, test=develop

* refine, test=develop

* refine, test=develop

* refine, test=develop

* refine, test=develop

* refine, test=develop