Remove a bunch of custom logic to determine when a callable reference is
bound or not (and hence mustn't have a receiver). Instead, a helper
extension is introduced to determine when a callable reference is bound
by checking if dispatch/extensionReceiver is not FirNoReceiver and the
referenced member is not static.
#KT-57253 Fixed
A::foo is preferably resolved as an unbound reference to A.foo, however
if A.Companion is a subtype of A and the expected type has one fewer
parameter than the type of the unbound reference, generate a bound
reference with the companion as receiver.
^KT-56519 Fixed