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/enum/localEnums.kt

@@ -0,0 +1,18 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+fun foo() {
+    <!LOCAL_ENUM_NOT_ALLOWED!>enum class A<!> {
+        FOO
+        BAR
+    }
+    val foo = A.FOO
+    val b = object {
+        <!LOCAL_ENUM_NOT_ALLOWED!>enum class B<!> {}
+    }
+    class C {
+        <!LOCAL_ENUM_NOT_ALLOWED!>enum class D<!> {}
+    }
+    val f = {
+        <!LOCAL_ENUM_NOT_ALLOWED!>enum class E<!> {}
+    }
+}