* Draft version of the Swish nGraph operation and fusing transformations for different approaches to express the operation
* Swish fusing transformation refactoring
* Added Swish operation and extractor for TF. Removed unfolding transformation for the operation.
* Added SwishIE. Implemented transformation to convert Swish to SwishIE.
* Code style fixes
* Updated Swish reference implementation. Added tests for shape and value inference
* Fixed code style for Python API
* Fixed unit test
* Apply review comments
* Use matcher_pass_callback
* Make m_alpha attribute protected in the SwishIE operation
* Fixed Swish op PythonAPI test
* Enable ngraph python tests
* Refactor and unify ngraph with onnx python tests
* Revert deprecated test cases
* Set ngraph and onnx python tests as a one test suite execution
* Change unstrict Xfails to strict ones
* Update after review:
- add model zoo to onnx tests,
- improvements of tests
* Revert mounting zoo models dir
Co-authored-by: Michał Karzyński <4430709+postrational@users.noreply.github.com>
