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

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

@@ -0,0 +1,41 @@
+package foo
+
+fun box(): String {
+    var log = ""
+
+    var s: Any? = null
+    for (t in arrayOf("1", "2", "3")) {
+        fun foo() = {
+            fun q() = { t }
+            q()
+        }
+
+        if (s == null) {
+            s = foo()
+        }
+
+        log += (s as (() -> (() -> String)))()()
+    }
+
+    if (log != "111") return "fail1: ${log}"
+
+    s = null
+    log = ""
+    for (t in arrayOf("1", "2", "3")) {
+        fun foo() = {
+            val y = t
+            fun q() = { y }
+            q()
+        }
+
+        if (s == null) {
+            s = foo()
+        }
+
+        log += (s as (() -> (() -> String)))()()
+    }
+
+    if (log != "111") return "fail2: ${log}"
+
+    return "OK"
+}