Prohibit local objects and enum classes

#KT-5402 Fixed
  #KT-4838 Fixed

Resolve type of object inside local object as special, not supertype('Any').
Changed visibility of constructor of anonymous object to 'internal' to be able to resolve the following:
fun box(): String {
    var foo = object {
        val bar = object {
            val baz = "ok"
        }
    }
    return foo.bar.baz
}
The containing declaration of property initializers is constructor, so 'baz' was invisible inside private constructor.

compiler/testData/diagnostics/tests/inline/unsupportedConstruction.kt

@@ -8,9 +8,9 @@ inline fun unsupported() {
         }
     }<!>
 
-    <!NOT_YET_SUPPORTED_IN_INLINE!>object B{
-        object BInner {}
-    }<!>
+    <!LOCAL_OBJECT_NOT_ALLOWED!>object B<!>{
+        <!LOCAL_OBJECT_NOT_ALLOWED!>object BInner<!> {}
+    }
 
     <!NOT_YET_SUPPORTED_IN_INLINE!>fun local() {
         fun localInner() {}