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/codegen/box/enum/inFunction.kt

@@ -1,11 +0,0 @@
-// KT-2948 Assertion fails on a local enum
-
-fun foo(): String {
-   enum class E {
-       OK
-   }
-
-   return E.OK.toString()
-}
-
-fun box(): String = foo()

compiler/testData/codegen/box/enum/kt2673.kt

@@ -1,8 +0,0 @@
-fun box(): String {
-    enum class K {
-        O
-        K
-    }
-
-    return K.O.toString() + K.K.toString()
-}