Minor, add test on annotation in enum companion

idea/testData/decompiler/stubBuilder/Enum/Enum.kt

@@ -8,6 +8,9 @@ enum class Enum {
     open fun f() = 3
 
     companion object {
+        @Ann
         val c: Int = 1
     }
-}
+}
+
+annotation class Ann

idea/testData/decompiler/stubBuilder/Enum/Enum.txt

@@ -49,6 +49,21 @@ PsiJetFileStubImpl[package=a.b.c.test.enum]
         CLASS_BODY:
           PROPERTY:[fqName=a.b.c.test.enum.Enum.Companion.c, hasDelegate=false, hasDelegateExpression=false, hasInitializer=false, hasReturnTypeRef=true, isExtension=false, isTopLevel=false, isVar=false, name=c]
             MODIFIER_LIST:[public final]
+              ANNOTATION_ENTRY:[hasValueArguments=false, shortName=Ann]
+                CONSTRUCTOR_CALLEE:
+                  TYPE_REFERENCE:
+                    USER_TYPE:[isAbsoluteInRootPackage=false]
+                      USER_TYPE:[isAbsoluteInRootPackage=false]
+                        USER_TYPE:[isAbsoluteInRootPackage=false]
+                          USER_TYPE:[isAbsoluteInRootPackage=false]
+                            USER_TYPE:[isAbsoluteInRootPackage=false]
+                              USER_TYPE:[isAbsoluteInRootPackage=false]
+                                REFERENCE_EXPRESSION:[referencedName=a]
+                              REFERENCE_EXPRESSION:[referencedName=b]
+                            REFERENCE_EXPRESSION:[referencedName=c]
+                          REFERENCE_EXPRESSION:[referencedName=test]
+                        REFERENCE_EXPRESSION:[referencedName=enum]
+                      REFERENCE_EXPRESSION:[referencedName=Ann]
             TYPE_REFERENCE:
               USER_TYPE:[isAbsoluteInRootPackage=false]
                 USER_TYPE:[isAbsoluteInRootPackage=false]