Get rid of all classes except kotlin.reflect.KFunction, which will be used to
represent all kinds of simple functions.
Lots of changes to test data are related to the fact that KFunction is not an
extension function (as opposed to KMemberFunction and KExtensionFunction who
were) and so a member or an extension function reference now requires all
arguments be passed to it in the parentheses, including receivers. This is
probably temporary until we support calling any function both as a free
function and as an extension. In JS, functions and extension functions are not
interchangeable, so tests on this behavior are removed until this is supported
Reflection interfaces (interfaces in kotlin.reflect.* in core/builtins/) are
now fully considered as built-ins and can be accessed via KotlinBuiltIns. This
increases runtime size by ~20kb, but only because KotlinBuiltIns is static and
is therefore constructed only via resource loading from the compiler classpath
at the moment. As soon as it's possible to inject KotlinBuiltIns to the
particular resolution process, the metadata on JVM will be loaded via standard
annotation mechanism (kotlin.jvm.internal.KotlinClass/KotlinPackage) and wasted
runtime space will be reclaimed
Yan Zhulanow