JS: move expressions test to box tests

js/js.translator/testData/box/expression/invoke/invokeInExtensionFunctionLiteral.kt

@@ -0,0 +1,13 @@
+package foo
+
+fun box(): String {
+    val v1 = 1.(fun Int.(x: Int) = this + x)(2)
+
+    val f = fun Int.(x: Int) = this + x
+    val v2 = 1.(f)(2)
+
+    if (v1 != 3) return "fail1: $v1"
+    if (v2 != 3) return "fail2: $v2"
+
+    return "OK"
+}