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/compileJavaAgainstKotlin/enum/DefaultArgumentInEnumConstructor.txt

@@ -20,6 +20,7 @@ public final enum class K : kotlin.Enum<test.K> {
     public final /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun getDeclaringClass(): java.lang.Class<test.K!>!
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<test.K>
     public final /*synthesized*/ fun valueOf(/*0*/ kotlin.String): test.K
     public final /*synthesized*/ fun values(): kotlin.Array<test.K>
 }