[PyOV] OpExtension

[akuporos]

Details:

• Moved DiscretTypeInfoWrapper class from cpp to header.
• Add new overloading for core.add_extension which takes op class as an argument.
• Split PyOp to header and implementation
• Add bindings for OpExtension
• Add default implementation for get_type_info and clone_with_new_inputs to allow users create a custom operation without adding of these methods.
• Simplified Op ctor:
  Before (and still working approach):

  def __init__(self, inputs=None):
       super().__init__(self)
       if inputs is not None:
           self.set_arguments(inputs)
           self.constructor_validate_and_infer_types()

After

  def __init__(self, inputs=None):
       super().__init__(self, inputs)

Tickets:

• CVS-148474