* [MO] Split iteration node for TensorIterator in case multiple consumers Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com> * Implement additional BackEdgeTensorIterator and NonConstBeginStridedSlice transformations Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com> * Finalize implementation of DIEN support by the MO tool Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com> * Add unit test for NonConstBeginStridedSliceReplacement transformation Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com> * Fix retrieving shrink_axis_mask attribute value Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com> * Address the majority of review feedback Signed-off-by: Roman Kazantsev <roman.kazantsev@intel.com>