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/fir/analysis-tests/testData/resolve/enum.fir.txt

@@ -51,6 +51,9 @@ FILE: enum.kt
         public final static fun valueOf(value: R|kotlin/String|): R|SomeEnum| {
         }
 
+        public final static val entries: R|kotlin/enums/EnumEntries<SomeEnum>|
+            public get(): R|kotlin/enums/EnumEntries<SomeEnum>|
+
     }
     public final enum class E : R|kotlin/Enum<E>| {
         public final static enum entry A: R|E|
@@ -64,6 +67,9 @@ FILE: enum.kt
         public final static fun valueOf(value: R|kotlin/String|): R|E| {
         }
 
+        public final static val entries: R|kotlin/enums/EnumEntries<E>|
+            public get(): R|kotlin/enums/EnumEntries<E>|
+
     }
     public final enum class EnumClass : R|kotlin/Enum<EnumClass>| {
         private constructor(): R|EnumClass| {
@@ -109,4 +115,7 @@ FILE: enum.kt
         public final static fun valueOf(value: R|kotlin/String|): R|EnumClass| {
         }
 
+        public final static val entries: R|kotlin/enums/EnumEntries<EnumClass>|
+            public get(): R|kotlin/enums/EnumEntries<EnumClass>|
+
     }