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.

analysis/low-level-api-fir/testdata/innerDeclarationsResolve/enum.fir.txt

@@ -20,4 +20,7 @@ FILE: enum.kt
         public final static [BODY_RESOLVE] fun valueOf([BODY_RESOLVE] value: R|kotlin/String|): R|Enum| {
         }
 
+        public final static [BODY_RESOLVE] val entries: R|kotlin/enums/EnumEntries<Enum>|
+            public [BODY_RESOLVE] get(): R|kotlin/enums/EnumEntries<Enum>|
+
     }