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

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

@@ -0,0 +1,23 @@
+package foo
+
+fun box(): String {
+    val t = myRun {
+                object {
+                    fun foo() = "3"
+
+                    fun boo(param: String): String {
+                        val a = object {
+                            fun bar() = "57"
+                            fun b(): String = myRun { param + bar() + foo() }
+                        }
+
+                        return a.b()
+                    }
+                }
+            }
+
+    val r = t.boo("OK")
+    if (r != "OK573") return "r != \"OK573\", r = \"$r\""
+
+    return "OK"
+}