Fix compilation.

- rename isFinal extension property to avoid ambiguity with synthetic property in DeserializedClassTypeConstructor
- add explicit parameter to lambda File.listFiles
- return true from lambda Query.forEach

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedClassDescriptor.kt

@@ -181,7 +181,7 @@ public class DeserializedClassDescriptor(
 
         override fun getSupertypes() = supertypes()
 
-        override fun isFinal(): Boolean = isFinal
+        override fun isFinal(): Boolean = isFinalClass
 
         override fun isDenotable() = true