Change outer scope for nested class and object -- removed implicit outer class receiver.

#KT-5362 Fixed
#KT-8814 Fixed

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

@@ -0,0 +1,16 @@
+object Object {
+    class NestedClass {
+        fun test() {
+            outerFun()
+            outerVal
+            OuterObject
+            OuterClass()
+        }
+    }
+
+    fun outerFun() {}
+    val outerVal = 4
+
+    object OuterObject
+    class OuterClass
+}