[KAPT4] KT-51982 Implement generation of @Metadata annotations in Java stubs

Also adds rendering of @Metadata annotations in Kapt3 and Kapt4 tests
(currently disabled for a few tests).

Co-authored-by: Alexander Udalov <alexander.udalov@jetbrains.com>

plugins/kapt3/kapt3-compiler/testData/converter/recentlyNullable.txt

@@ -21,6 +21,23 @@ import java.lang.annotation.*;
 
 package app;
 
+/**
+ * public final class app/KBox : androidx/annotation/Box {
+ *
+ *   // signature: <init>(Landroidx/annotation/Box;)V
+ *   public constructor(delegate: androidx/annotation/Box)
+ *
+ *   // signature: foo()Ljava/lang/String;
+ *   public open (* delegation *) fun foo(): kotlin/String!
+ *
+ *   // field: delegate:Landroidx/annotation/Box;
+ *   // getter: getDelegate()Landroidx/annotation/Box;
+ *   public final val delegate: androidx/annotation/Box
+ *     public final get
+ *
+ *   // module name: main
+ * }
+ */
 @kotlin.Metadata()
 public final class KBox implements androidx.annotation.Box {
     @org.jetbrains.annotations.NotNull()