Include WasExperimental into builtins serialization

It is required for stabilizing previously experimental
builtin functions and classes (KT-53778)
in order to mark them WasExperimental,
so that they are available for previously opted in users

compiler/fir/analysis-tests/testData/builtIns/kotlin.txt

@@ -1410,3 +1410,11 @@ public final object Unit : R|kotlin/Any| {
 
 }
 
+@R|kotlin/annotation/Target|(allowedTargets = <implicitArrayOf>(R|kotlin/annotation/AnnotationTarget.CLASS|, R|kotlin/annotation/AnnotationTarget.PROPERTY|, R|kotlin/annotation/AnnotationTarget.CONSTRUCTOR|, R|kotlin/annotation/AnnotationTarget.FUNCTION|, R|kotlin/annotation/AnnotationTarget.TYPEALIAS|)) @R|kotlin/annotation/Retention|(value = R|kotlin/annotation/AnnotationRetention.BINARY|) internal final annotation class WasExperimental : R|kotlin/Annotation| {
+    public final val markerClass: R|kotlin/Array<out kotlin/reflect/KClass<out kotlin/Annotation>>|
+        public get(): R|kotlin/Array<out kotlin/reflect/KClass<out kotlin/Annotation>>|
+
+    public constructor(vararg markerClass: R|kotlin/Array<out kotlin/reflect/KClass<out kotlin/Annotation>>|): R|kotlin/WasExperimental|
+
+}
+

compiler/testData/builtin-classes/default/kotlin.txt

@@ -811,3 +811,9 @@ public object Unit {
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.TYPE}) @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE) @kotlin.annotation.MustBeDocumented public final annotation class UnsafeVariance : kotlin.Annotation {
     /*primary*/ public constructor UnsafeVariance()
 }
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.TYPEALIAS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) internal final annotation class WasExperimental : kotlin.Annotation {
+    /*primary*/ public constructor WasExperimental(/*0*/ vararg markerClass: kotlin.reflect.KClass<out kotlin.Annotation> /*kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>*/)
+    public final val markerClass: kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+        public final fun `<get-markerClass>`(): kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+}

compiler/testData/builtin-classes/java6/kotlin.txt

@@ -842,3 +842,9 @@ public object Unit {
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.TYPE}) @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE) @kotlin.annotation.MustBeDocumented public final annotation class UnsafeVariance : kotlin.Annotation {
     /*primary*/ public constructor UnsafeVariance()
 }
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.TYPEALIAS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) internal final annotation class WasExperimental : kotlin.Annotation {
+    /*primary*/ public constructor WasExperimental(/*0*/ vararg markerClass: kotlin.reflect.KClass<out kotlin.Annotation> /*kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>*/)
+    public final val markerClass: kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+        public final fun `<get-markerClass>`(): kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+}

compiler/testData/builtin-classes/java8/kotlin.txt

@@ -849,3 +849,9 @@ public object Unit {
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.TYPE}) @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE) @kotlin.annotation.MustBeDocumented public final annotation class UnsafeVariance : kotlin.Annotation {
     /*primary*/ public constructor UnsafeVariance()
 }
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.TYPEALIAS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) internal final annotation class WasExperimental : kotlin.Annotation {
+    /*primary*/ public constructor WasExperimental(/*0*/ vararg markerClass: kotlin.reflect.KClass<out kotlin.Annotation> /*kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>*/)
+    public final val markerClass: kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+        public final fun `<get-markerClass>`(): kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+}

compiler/testData/builtin-classes/newMethods/kotlin.txt

@@ -846,3 +846,9 @@ public object Unit {
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.TYPE}) @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE) @kotlin.annotation.MustBeDocumented public final annotation class UnsafeVariance : kotlin.Annotation {
     /*primary*/ public constructor UnsafeVariance()
 }
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.TYPEALIAS}) @kotlin.annotation.Retention(value = AnnotationRetention.BINARY) internal final annotation class WasExperimental : kotlin.Annotation {
+    /*primary*/ public constructor WasExperimental(/*0*/ vararg markerClass: kotlin.reflect.KClass<out kotlin.Annotation> /*kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>*/)
+    public final val markerClass: kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+        public final fun `<get-markerClass>`(): kotlin.Array<out kotlin.reflect.KClass<out kotlin.Annotation>>
+}

core/builtins/build.gradle.kts

@@ -44,6 +44,7 @@ val prepareRangeSources by tasks.registering(Sync::class) {
     from(kotlinAnnotationsCommon) {
         include("ExperimentalStdlibApi.kt")
         include("OptIn.kt")
+        include("WasExperimental.kt")
     }
 
     into(rangesCherryPicked)