Fix JavaClassifierType.getTypeArguments impls

Make them return arguments both for current classifier and for the outer one

compiler/testData/loadJava/compiledJava/InnerClassesInGeneric.txt

@@ -7,7 +7,7 @@ public open class InnerClassesInGeneric</*0*/ P : kotlin.Any!, /*1*/ Q : kotlin.
         public constructor Inner()
     }
 
-    public open inner class Inner2 : test.InnerClassesInGeneric.Inner {
+    public open inner class Inner2 : test.InnerClassesInGeneric<P!, Q!>.Inner {
         public constructor Inner2()
         public open operator fun iterator(): kotlin.(Mutable)Iterator<P!>!
     }