eolian: strict function type input checks in APIs

eolian: strict function type input checks in APIs

Strictness of various Eolian APIs has been enhanced, for example
eolian_class_function_get_by_name now won't return anything if
you request an EOLIAN_PROPERTY and the found func is just an
EOLIAN_PROP_GET, and various APIs won't accept arbitrary inputs
like EOLIAN_UNRESOLVED or EOLIAN_PROPERTY now, instead you will
need to provide EOLIAN_PROP_GET, EOLIAN_PROP_SET or EOLIAN_METHOD
explicitly.

The purpose of this is to reduce potential bugs and fix ambiguous
behavior. Thanks to use of EINA_SAFETY, appropriate errors should
be printed into terminal when an API is used incorrectly.