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/diagnostics/testsWithStdLib/trailingComma/valueParametersWithDisabledFeature.txt

@@ -63,6 +63,7 @@ public final enum class Foo3 : kotlin.Enum<Foo3> {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<Foo3>
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): Foo3
     public final /*synthesized*/ fun values(): kotlin.Array<Foo3>
 }

compiler/testData/diagnostics/testsWithStdLib/trailingComma/valueParametersWithEnabledFeature.txt

@@ -60,6 +60,7 @@ public final enum class Foo3 : kotlin.Enum<Foo3> {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<Foo3>
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): Foo3
     public final /*synthesized*/ fun values(): kotlin.Array<Foo3>
 }