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

js/js.translator/testData/box/closure/deepInnerClassInLocalClass.kt

@@ -0,0 +1,23 @@
+package foo
+
+class A() {
+    fun test(): Int {
+        open class B(open val x: Int) {
+            inner class C(x: Int) : B(x * 10) {
+                inner class D() {
+                    var baz: () -> Int = { 0 }
+                    constructor(b: Boolean) : this() {
+                        baz = { x + this@B.x }
+                    }
+                    fun bar() = { 100 * (x + this@B.x) }
+                }
+            }
+        }
+        return B(3).C(2).D().bar()() + B(5).C(4).D(true).baz()
+    }
+}
+
+fun box(): String {
+    assertEquals(2345, A().test())
+    return "OK"
+}