Currently FirThisReceiverExpression of instance methods are translated
to references of the class' thisReceiver,
not the method's dispatch receiver,
which causes problems with IrFrameMap::typeOf,
as the class' thisReceiver is not in the typeMap.
This commit translates non-qualified "this" references of
instance methods to references of the methods' dispatch receiver.
Protected should be translated to public as in Java so that everything would
work at runtime. The real visibility is still saved to an InnerClasses
attribute
#KT-8269 Fixed
#KT-9246 Fixed
#KT-10143 Fixed