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/writeFlags/class/visibility/internal/enum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 enum class MyClass() {
 }
 

compiler/testData/writeFlags/class/visibility/internal/innerEnum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 class Foo {
   enum class MyClass() {
   }

compiler/testData/writeFlags/class/visibility/packageprivate/enumEntry.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 enum class Foo {
     A {
         fun foo() {}

compiler/testData/writeFlags/class/visibility/private/enum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 private enum class MyClass() {
 }
 

compiler/testData/writeFlags/class/visibility/private/innerEnum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 // NO_FLAGS because we put enum in companion object of foo. When it will be fixed - MyClass should have ACC_PRIVATE flag
 
 class Foo {

compiler/testData/writeFlags/class/visibility/public/enum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 public enum class MyClass() {
 }
 

compiler/testData/writeFlags/class/visibility/public/innerEnum.kt

@@ -1,4 +1,3 @@
-// WITH_STDLIB
 class Foo {
   public enum class MyClass() {
   }