JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/classObject/invokeOperatorInCompanionObject.kt

@@ -0,0 +1,22 @@
+// See KT-11100
+package foo
+
+class Div {
+    var className: String? = null
+
+    companion object {
+        operator fun invoke(init: Div.() -> Unit): Div {
+            val div = Div()
+            div.init()
+            return div
+        }
+    }
+}
+
+fun box(): String {
+    val x = Div {
+        className = "ui container"
+    }
+    assertEquals("ui container", x.className)
+    return "OK"
+}