Inaccessible outer class member is now an error

#KT-1174 In Progress

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

@@ -0,0 +1,11 @@
+class Outer {
+    class Nested {
+        fun foo() {
+            class Local {
+                val state = <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!>outerState<!>
+            }
+        }
+    }
+    
+    val outerState = 42
+}