Despite the fact that the LHS of a double colon expression is now KtExpression
instead of KtUserType, we must still consider it a type for callable references
to work. Extract and reuse relevant parts of QualifiedExpressionResolver and
TypeResolver to support this behavior
Infer something sensible instead of error types when an error is reported, such
as absence of a type argument for Array or presence of type arguments for other
types
Dmitriy Novozhilov