JS: add test to prove that anonymous function that declares lambda is translated correctly. See KT-11589

js/js.translator/testData/box/expression/function/anonymousWithLambda.kt

@@ -0,0 +1,7 @@
+fun box(): String {
+    val a = (fun(): String {
+        val o = { "O" }
+        return o() + "K"
+    })
+    return a()
+}