* Atan2 op

* add serialize_attrs and deserialize_attrs API

* add doc comments

* update function signature

* Implements proveance tag propagation for reshape sinking pass

* Addresses code review feedback.

* Applies style fixes.

* Add missing input

* If builder does nothing, don't dive into the inputs

* Reverse test

* simplify, add test

* Add test

* Build changes for -Wall

* Use properties

* Remove no-zero-as-null-pointer-constant

* add ##__VAR_ARGS__ workaround

* enable gnu-zero-variadic-macro-arguments warning

* fix gnu-zero-variadic-macro-arguments

* use PrintToDummyParamName

* remove ##__VA_ARGS__ workaround

* fix ##__VA_ARGS__ and enable gnu-zero-variadic-macro-arguments

* handle windows build

* use alternative fix to support VS compiler

* Allow TBB to be excluded from CPU build.

* Change some CMake scope.

* m_use_tbb can be removed if TBB is not enabled.

* Fix some rebase errors

* Some files do not get definition.

* CPU codegen: Use different pregenerated code if TBB is not built.

* Fix codegen issues.

* Fix bug.

* Use NGRAPH_TBB_ENABLE only for CPU.

* OSX SDK links changed

* Add provenance for ops created in op constructors
Fix optimization in provenance groups

* Provenance for builders

* Tests

* Tests

* Update src/ngraph/node.hpp
Co-Authored-By: Sayantan Sarkar <sayantan.sarkar@intel.com>

* style

* resolve compiler warnings for undefined-func-template & float-conversion

* resolve compiler warnings for undefined-func-template & float-conversion

* resolve undefined-func-template warn for test

* remove no-sign-compare and no-double-promotion

* fix gather compile issue

* Fixes bug in provenenace for subgraph replacement

* Updates unit tests for the provenance algorithm fix

* Changes provnance set to ordered set for better consistency in iteration order.

* Fix unsigned comparison and implicit double conversion

* Missed file

* openmp req

* Enable some warnings

* Unused param

* Unused params

* Unused params

* Unused params

* Unused params

* Unused param

* Unused params

* unused params

* unused params

* unused params

* unused params

* unused params

* unused params

* unused params

* Adds option to switch off provenance tag propagation in runtime

* Fixes style issues.

* Separate dynamic loading from static linking

* Missed find_my_pathname

* Add method to check if an Executable can create tensors

* Add a Backend check to see if Executable can create tensors

* Update per review comment

* style

* Possible fix so that backend does not keep holding on to the dummy ng_exec

* Fix sum reference to handle corner cases with +-inf

* Review comments, and try to make Windows happy

* Update GPU unit_test.manifest

* More template grindery, to make macOS happy

Cherry-pick "Fix crash when NGRAPH_ENABLE_{VISUALIZE,SERIALIZE}_TRACING=1" to r0.25

* adding group convolution implementation for plaidml

* update CMakeLists.txt to include new group convolution files

* adding new ngraph unit tests for grouped convolutions

* adding group conv unit test back in for plaidml backend

* specify group convolution support in plaidml

* add denise as codeowner for plaidml runtime dir

* remove commented-out lines of unit test manifest

* style changes

* resolve all discussions in PR

* skip data dilation unit test on cpu backend

* Don't enable dl use in static builds

remove dladdr in static

* Swap dlerror defs

* - add NGRAPH_INTERPRETER_STATIC_LIB_ENABLE && NGRAPH_CPU_STATIC_LIB_ENABLE as compiler definitions

* Don't look for backends if static

* - add dummy function to register quantized concat and max_pool for static build

* Fix ifdef

* Adjust ROIPolling

* Fixed comment

* - private function to static initlize all the backend for static library builds

* - export backend function on windows

* -fix_typo

* [ONNX] Remove unused includes

* Update headers

* Clang format

* WIP

* CHANGE_DYNAMIC_STATE

* Implement full type prop for DynBroadcast when inputs const/static; clean up pass properties

* Add a unit test for the late-constness thing

* Fix merge

* style

* [Py] Added grn operator to Python API.

* [Py] Changed order of included files.

* [Py] Changed docstring.

* style