JS: move expressions test to box tests

js/js.translator/testData/box/dynamic/callMethods.kt

@@ -0,0 +1,10 @@
+package foo
+
+fun box(): String {
+    assertEquals("bar.boo(23)", bar.boo(23))
+    assertEquals("bar.boo(Hello)", bar.boo("Hello"))
+    assertEquals("bar.boo(object t {})", bar.boo(t))
+    assertEquals("bar.boo(null)", bar.boo(null))
+
+    return "OK"
+}