Move ie tests (#9161)

* Moved inference engine tests

* Fixed cmake

* Fixed paths

* Try to fix build

* Try to fix fluid tests

* Try to fix CI

* One more fix

* New issue

* Additional fix

* Disable Wall for tests

* Fixed old unit tests

* Revert "Disable Wall for tests"

This reverts commit 8b6e058f59.

* Fixed some tests

* Fixed master build

* Fix build

* Fixed some warning

* Fixed merge conflicts

* Try to fix LTO

docs/nGraph_DG/nGraphTransformation.md

@@ -430,7 +430,7 @@ PassConfig instance taken from pass::Manager is shared across all registered tra
 ## Transformations testing <a name="transformations_testing"></a>
 
 If you are developing new transformation inside plugin, you need to add test into the `template_plugin/tests/functional/transformations` folder.
-We have two types of tests: nGraph reader tests located in `inference-engine/tests/functional/inference_engine/ngraph_reader` and transformation tests located in `inference-engine/tests/functional/inference_engine/transformations`
+We have two types of tests: nGraph reader tests located in `src/tests/functional/inference_engine/ngraph_reader` and transformation tests located in `src/tests/functional/inference_engine/transformations`
 Reader tests are IR based and test end-to-end conversion from IR to CNNNetwork. Transformation tests test single ngraph transformations or low-level functions that are used inside transformations.
 
 The basic transformation test looks like this: