JS: move expressions test to box tests

js/js.translator/testData/box/dynamic/infixCall.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"
+}