[codeInsight] IDEA-236735 Java enum constant is called "Anonymous inner class"

There used to be a vague error message for enum constants that don't
implement methods from an interface which refers to them as
'Anonymous class deriving from *Enum'. This patch makes the message clear
displaying the real names of the enum constants in the error message.

Signed-off-by: Nikita Eshkeev <nikita.eshkeev@jetbrains.com>

GitOrigin-RevId: 700bc2b579e0c8552858ab881d9a3e4e8d81b1f8

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/EnumImplementsInterface.java

@@ -0,0 +1,41 @@
+interface MyInterface {
+  void method1();
+}
+
+<error descr="Class 'SampleEnum1' must either be declared abstract or implement abstract method 'method1()' in 'MyInterface'">enum SampleEnum1 implements MyInterface</error> {
+  ONE;
+}
+
+enum SampleEnum2 implements MyInterface {
+  <error descr="Enum constant 'ONE' must implement abstract method 'method1()' in 'MyInterface'">ONE</error>{};
+}
+
+enum SampleEnum3 implements MyInterface {
+  ONE;
+
+  @Override
+  public void method1() { }
+}
+
+enum SampleEnum4 implements MyInterface {
+  ONE {
+    @Override
+    public void method1() { }
+  };
+}
+
+enum SampleEnum5 implements MyInterface {
+  <error descr="Enum constant 'ONE' must implement abstract method 'method1()' in 'MyInterface'">ONE</error>("one") {};
+
+  SampleEnum5(final String name) {}
+}
+
+
+enum SampleEnum6 implements MyInterface {
+  ONE("one") {
+    @Override
+    public void method1() {}
+  };
+
+  SampleEnum6(final String name) {}
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/EnumWithAbstractMethods.java

@@ -1,5 +1,5 @@
 <error descr="Modifier 'abstract' not allowed here">abstract</error> enum OurEnum {
-  <error descr="Class 'Anonymous class derived from OurEnum' must implement abstract method 'foo()' in 'OurEnum'">A</error> {
+  <error descr="Enum constant 'A' must implement abstract method 'foo()' in 'OurEnum'">A</error> {
   },
   <error descr="'OurEnum' is abstract; cannot be instantiated">B</error>,
   C {
@@ -12,7 +12,7 @@
 
 enum xxx {
   <error descr="'xxx' is abstract; cannot be instantiated">X</error>,
-  <error descr="Class 'Anonymous class derived from xxx' must implement abstract method 'f()' in 'xxx'">Y</error> {
+  <error descr="Enum constant 'Y' must implement abstract method 'f()' in 'xxx'">Y</error> {
   };
 
   abstract void f();