Add EnumEntries to minimal-stdlib-for-tests

This change allows to revert adding `WITH_STDLIB` directive
to tests which happened at `a9343aeb`.

Co-authored-by: Alexander Udalov <Alexander.Udalov@jetbrains.com>

compiler/testData/diagnostics/tests/j+k/enumGetOrdinal.txt

@@ -18,6 +18,7 @@ public final enum class MyEnum : kotlin.Enum<MyEnum!> {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<MyEnum>
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): MyEnum
     public final /*synthesized*/ fun values(): kotlin.Array<MyEnum>
 }

compiler/testData/diagnostics/tests/j+k/kt2619.txt

@@ -19,6 +19,7 @@ public final enum class Type : kotlin.Enum<Type!> {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<Type>
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): Type
     public final /*synthesized*/ fun values(): kotlin.Array<Type>
 }

compiler/testData/diagnostics/tests/j+k/serializable.txt

@@ -24,6 +24,7 @@ public final enum class C : kotlin.Enum<C> {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<C>
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): C
     public final /*synthesized*/ fun values(): kotlin.Array<C>
 }