* Add type prop tests for shape and type propagation
* Add visitor test
* Add SLT test class for result op
* Add SSLT for result op
* Add CPU SLT
* Add backend test
* Applying review comments - fix typo in slt, replace type info with NGRAPH_RTTI_DEFINITION
* Applying changes after review comments
* Add result to trusted ops list
* fix adding redundant nodes in slt