efl_mono: Fix support for event arguments.

efl_mono: Fix support for event arguments.

Summary:
Using a type visitor scheme similar to type and marshall_type, to ease
increasing coverage for other types if needed.

Also, changed the filter functions for those selections to check for the
full name of the regular_type_def, allowing a better specificity of the
name selections. This fixes things like "Eina.Error", which was
conflicting with Efl.Image.Load.Error when we compared only the last
name. It didn't appear before as Load.Error only appears in a
Efl.Image.Load event.
Depends on D5996

Reviewers: felipealmeida

Reviewed By: felipealmeida

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D5997