Inaccessible outer class member is now an error

#KT-1174 In Progress

compiler/testData/diagnostics/tests/inner/localClass.kt

@@ -0,0 +1,18 @@
+class Outer {
+    fun foo(): Int {
+        if (outerState > 0) return outerState
+        
+        class Local {
+            val localState = outerState
+            
+            inner class LocalInner {
+                val o = outerState
+                val l = localState
+            }
+        }
+        
+        return Local().localState
+    }
+    
+    val outerState = 42
+}