JVM/JVM_IR: fix mapping of KClass in annotation classes

* JVM incorrectly mapped T<KClass<...>> to T<Class<...>> because the
   annotation-ness of the type mapping mode was inherited one level
   down into a generic signature independent of T

 * JVM_IR was even worse as it did not use VALUE_FOR_ANNOTATION at all,
   mapping T<T<KClass<...>> to T<T<Class<...>> as well.

The correct behavior is to map KClass to Class only at top level or as
an argument of Array.

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrTypeMapper.kt

@@ -137,7 +137,7 @@ class IrTypeMapper(private val context: JvmBackendContext) : KotlinTypeMapperBas
                     arrayElementType = AsmTypes.OBJECT_TYPE
                     sw?.writeClass(arrayElementType)
                 } else {
-                    arrayElementType = mapType(memberType, mode.toGenericArgumentMode(variance), sw)
+                    arrayElementType = mapType(memberType, mode.toGenericArgumentMode(variance, ofArray = true), sw)
                 }
                 sw?.writeArrayEnd()