[K/JS] Compile Kotlin coroutines as JS generator ^KT-63038 Fixed

libraries/stdlib/js/runtime/kotlinJsHacks.kt

@@ -51,3 +51,9 @@ internal annotation class JsFun(val code: String)
  */
 @Target(AnnotationTarget.CLASS)
 internal annotation class JsImplicitExport
+
+/**
+ * The annotation is needed for annotating function declarations that should be compiled as ES6 generators
+ */
+@Target(AnnotationTarget.FUNCTION)
+internal annotation class JsGenerator