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/exhaustiveness/negative/missingEnumEntry.fir.txt

@@ -12,6 +12,9 @@ FILE: missingEnumEntry.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 fun test_1(enum: R|SomeEnum|): R|kotlin/Unit| {
         lval x: R|kotlin/Unit| = when (R|<local>/enum|) {

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveWhenAndDNNType.fir.txt

@@ -12,6 +12,9 @@ FILE: exhaustiveWhenAndDNNType.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 class B : R|kotlin/Any| {
         public constructor(): R|B| {

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveWhenAndFlexibleType.fir.txt

@@ -13,6 +13,9 @@ FILE: main.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 fun test_1(): R|kotlin/Unit| {
         lval e: R|E!| = Q|Utils|.R|/Utils.getEnum|()

compiler/fir/analysis-tests/testData/resolve/exhaustiveness/positive/exhaustiveness_enum.fir.txt

@@ -13,6 +13,9 @@ FILE: exhaustiveness_enum.kt
         public final static fun valueOf(value: R|kotlin/String|): R|Enum| {
         }
 
+        public final static val entries: R|kotlin/enums/EnumEntries<Enum>|
+            public get(): R|kotlin/enums/EnumEntries<Enum>|
+
     }
     public final fun test_1(e: R|Enum|): R|kotlin/Unit| {
         lval a: R|kotlin/Unit| = when (R|<local>/e|) {