NMS-4 op support (#1115)

NMS-4 op support (#1115)

* Specification for the NMS-4 operation (updated shape infer function)

* Enabled NMS-4 in the Model Optimizer

* Changed opset version for NMS with dynamic outputs and namespace to be "dynamic"

* Added NMS-4

* Added opset4 to the nGraph

* Added unit tests for NMS-4 type infer

* Renamed UpgradeNMS3ToNMS4 to UpgradeNMS3ToNMSDynamic. Added stub for ConvertNMS4ToLegacy

* Make IE aware of opset4 ops

* Updated NMSIE to have different shape infer function based on the NMS it was converted from. Implemented NMS4->NMSIE conversion

* Apply code style

* Updated StaticShapeNonMaximumSuppression op in the VPU

* Introduced new version of NMSIE operation with shape infer function from v4::NMS

* Fixed dynamicToStaticNonMaxSuppression transformation

* Added new version of NMSIE op with updated shape infer function

* Fixed NMS4 to NMSIE2 transformation

* Fixed constructors for nGraph ops v4::NM and dynamic::NMS

* Updated text in the opset4 specification document

* Code style fixes

* Fixed constructors for StaticShapeNMS + fixed test

* Minor change to the NMS op in the MO

* Fixed typo in the dynamic_to_static_shape_non_max_suppression transformation

* Removed redundant checks

* Refactored NMS infer and validate functions

* Added more checks to the validate_and_infer_types functions for NMS-3 and NMS-4

* Fixed compilation issue on Windows for op NMS

* Code style fixes

* Fixed typos in the NMSIE and NMSIE2 to CNNLayer op conversion

* Fixed typo in the ie_cnn_layer_builder_ngraph.cpp

* Fixed the NMSToLegacyNMS transformation. Added unit tests

* Apply code review comments

* Refactored NMSIE to use visitors

* Removed calling ConvertNMS4ToLegacy in the common optimizations

* Moved NMS4ToNMSLegacy to convert1_to_legacy group of transformations

* Removed useless include statement

* Removed copy-paste issue

Co-authored-by: Evgeny Lazarev <elazarev.nnov@gmail.com>