Fix reflection on top level declarations from other modules

The main problem here is that moduleName that is being passed to KPackageImpl
is useless: as can be seen in
ClosureCodegen.generateCallableReferenceDeclarationContainer, the name of the
current module is always written to the class file for a callable reference,
not the name of the module of the referenced declaration. This resulted in
reflection not loading the correct .kotlin_module file and subsequently not
finding the required file facade for a top-level function.

The commit does not fix the issue with the incorrect module name written in the
back-end, but workarounds it. It turns out, reflection can figure out the name
of the module of the referenced declaration itself by parsing the header from
the given java.lang.Class object for a single-file/multi-file package facade
and extract the package_module_name protobuf extension. Similar code was
already there in Member.getKPackage() in ReflectJvmMapping.kt but it did not
support multi-file classes, of which there are a lot in the standard library;
this is now supported

 #KT-12630 Fixed
 #KT-14731 Fixed

compiler/testData/codegen/box/reflection/functions/functionFromStdlib.kt

@@ -1,6 +1,9 @@
+// IGNORE_BACKEND: JS
 // WITH_REFLECT
 
-fun doStuff(fn: String.() -> String) = "ok".fn()
+import kotlin.reflect.KFunction1
+
+fun doStuff(fn: KFunction1<String, String>) = fn.call("ok")
 
 fun box(): String {
     return doStuff(String::toUpperCase)