0027566: Configuration - define Handle_ as non-template class for compatibility with...

0027566: Configuration - define Handle_ as non-template class for compatibility with C++/CLI

For MSVC compiler (version 12 and above), Handle_Class types are defined as true classes (inheriting corresponding opencascade::handle<Class>) to allow using them in "public" statement of C++/CLI language, to make these classes recognizable by other C++/CLI libraries.

Code to test operations with Handle_ class is added to QAHandleOps test command