[SLC] SymbolLightClassForEnumEntry: improve implementation

^KT-54051
^KT-50241

compiler/testData/asJava/lightClasses/EnumEntry.fir.java

@@ -0,0 +1,17 @@
+static final class FirstEntry /* p.KotlinEnum.FirstEntry*/ extends p.KotlinEnum {
+  private final int firstEntryProp = 4 /* initializer type: int */;
+
+  private int variable = 1 /* initializer type: int */;
+
+   FirstEntry();//  .ctor()
+
+  @java.lang.Override()
+  public void abstractFun();//  abstractFun()
+
+  public final int getFirstEntryProp();//  getFirstEntryProp()
+
+  public final int getVariable();//  getVariable()
+
+  public final void firstEntryFun();//  firstEntryFun()
+
+}

compiler/testData/asJava/lightClasses/EnumEntry.java

@@ -0,0 +1,16 @@
+public static final class FirstEntry /* p.KotlinEnum.FirstEntry*/ extends p.KotlinEnum {
+  private final int firstEntryProp;
+
+  private int variable;
+
+   FirstEntry();//  .ctor()
+
+  public final int getFirstEntryProp();//  getFirstEntryProp()
+
+  public final int getVariable();//  getVariable()
+
+  public final void firstEntryFun();//  firstEntryFun()
+
+  public void abstractFun();//  abstractFun()
+
+}

compiler/testData/asJava/lightClasses/EnumEntry.kt

@@ -0,0 +1,28 @@
+// p.KotlinEnum.FirstEntry
+
+package p
+
+enum class KotlinEnum {
+    FirstEntry {
+        fun firstEntryFun() = Unit
+        val firstEntryProp = 4
+        var variable: Int = 1
+            get() = 2
+            private set
+
+        override fun abstractFun() {
+            TODO("Not yet implemented")
+        }
+    },
+
+    SecondEntry {
+        fun secondEntryFun() = 3
+        val secondEntryProp = 2
+
+        override fun abstractFun() {
+            TODO("Not yet implemented")
+        }
+    };
+
+    abstract fun abstractFun()
+}

compiler/testData/asJava/lightClasses/EnumEntry.lib.java

@@ -0,0 +1,16 @@
+static final class FirstEntry /* p.KotlinEnum.FirstEntry*/ extends p.KotlinEnum {
+  private final int firstEntryProp;
+
+  private int variable;
+
+   FirstEntry();//  .ctor()
+
+  public final int getFirstEntryProp();//  getFirstEntryProp()
+
+  public final int getVariable();//  getVariable()
+
+  public final void firstEntryFun();//  firstEntryFun()
+
+  public void abstractFun();//  abstractFun()
+
+}