Update KotlinClassInnerStuffCache implementation

'KotlinClassInnerStuffCache' was copy-pasted from the platform's
'ClassInnerStuffCache' several years ago. After J2K and other changes,
it became quite dirty.

Besides cleaning things up, enum synthetic method handling have
significantly improved. Before, such methods were handled only in
'processDeclarationsInEnum', and 'getMethods()' didn't return them.
This led to inconsistent behavior and was reason for providing special
ad-hoc support in '1b6ded600518176b21cc308ed3e032ef8d04cc90'.

compiler/testData/asJava/lightClasses/AnnotatedParameterInEnumConstructor.java

@@ -1,6 +1,12 @@
 public enum AnnotatedParameterInEnumConstructor /* test.AnnotatedParameterInEnumConstructor*/ {
   A;
 
+  @org.jetbrains.annotations.NotNull()
+  public static test.AnnotatedParameterInEnumConstructor valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static test.AnnotatedParameterInEnumConstructor[] values();//  values()
+
   private  AnnotatedParameterInEnumConstructor(@test.Anno(x = "a") java.lang.String, @test.Anno(x = "b") java.lang.String);//  .ctor(java.lang.String, java.lang.String)
 
 }

compiler/testData/asJava/lightClasses/DeprecatedEnumEntry.java

@@ -3,6 +3,12 @@ public enum E /* p.E*/ {
   Entry2,
   Entry3;
 
+  @org.jetbrains.annotations.NotNull()
+  public static p.E valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static p.E[] values();//  values()
+
   private  E();//  .ctor()
 
 }

compiler/testData/asJava/lightClasses/compilationErrors/EnumNameOverride.java

@@ -1,6 +1,12 @@
 public enum EnumNameOverride /* EnumNameOverride*/ implements Bar {
   ;
 
+  @org.jetbrains.annotations.NotNull()
+  public static EnumNameOverride valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static EnumNameOverride[] values();//  values()
+
   private  EnumNameOverride();//  .ctor()
 
 }

compiler/testData/asJava/ultraLightClasses/enums.fir.java

@@ -4,6 +4,12 @@ public enum Direction /* Direction*/ {
   WEST,
   EAST;
 
+  @org.jetbrains.annotations.NotNull()
+  public static Direction valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static Direction[] values();//  values()
+
   private  Direction();//  .ctor()
 
 }
@@ -15,6 +21,12 @@ public enum Color /* Color*/ {
 
   private final int rgb;
 
+  @org.jetbrains.annotations.NotNull()
+  public static Color valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static Color[] values();//  values()
+
   private  Color(int);//  .ctor(int)
 
   private  Color(java.lang.String);//  .ctor(java.lang.String)
@@ -42,6 +54,12 @@ public enum ProtocolState /* ProtocolState*/ {
   @org.jetbrains.annotations.NotNull()
   public abstract ProtocolState signal();//  signal()
 
+  @org.jetbrains.annotations.NotNull()
+  public static ProtocolState valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static ProtocolState[] values();//  values()
+
   private  ProtocolState();//  .ctor()
 
 }
@@ -79,6 +97,12 @@ public enum IntArithmetics /* IntArithmetics*/ {
   @org.jetbrains.annotations.NotNull()
   public IntArithmetics applyAsInt(int, int);//  applyAsInt(int, int)
 
+  @org.jetbrains.annotations.NotNull()
+  public static IntArithmetics valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static IntArithmetics[] values();//  values()
+
   private  IntArithmetics();//  .ctor()
 
 }

compiler/testData/asJava/ultraLightClasses/enums.lib.java

@@ -5,6 +5,12 @@ public abstract enum ProtocolState /* ProtocolState*/ {
   @org.jetbrains.annotations.NotNull()
   public abstract ProtocolState signal();//  signal()
 
+  @org.jetbrains.annotations.NotNull()
+  public static ProtocolState valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static ProtocolState[] values();//  values()
+
   private  ProtocolState();//  .ctor()
 
 

compiler/testData/asJava/ultraLightClasses/inlineClasses.java

@@ -4,6 +4,12 @@ public final class UInt /* UInt*/ {
 public enum Foo /* Foo*/ {
   ;
 
+  @org.jetbrains.annotations.NotNull()
+  public static Foo valueOf(@org.jetbrains.annotations.NotNull() java.lang.String) throws java.lang.IllegalArgumentException;//  valueOf(java.lang.String)
+
+  @org.jetbrains.annotations.NotNull()
+  public static Foo[] values();//  values()
+
   public final int getX();//  getX()
 
 }