K1/K2: add Enum.entries unconditionally and filter them out in tower

Before this commit, we added Enum.entries only in case when
LanguageFeature.EnumEntries was ON (with an exception in K1/Java case).
In this commit we add Enum.entries unconditionally, and in case
the language feature is OFF we filter them out during tower resolve.

compiler/testData/codegen/box/reflection/builtins/enumNameOrdinal.kt

@@ -8,7 +8,7 @@ import kotlin.test.assertTrue
 enum class E { X, Y, Z }
 
 fun box(): String {
-    assertTrue(E::class.members.size in 11..12, "" + E::class.members.size)
+    assertTrue(E::class.members.size in 12..13, "" + E::class.members.size)
     assertEquals("Y", E::name.call(E.Y))
     assertEquals(2, E::ordinal.call(E.Z))
     return "OK"