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

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

@@ -0,0 +1,48 @@
+package foo
+
+fun funfun(): Boolean {
+    val result = true
+
+    fun foo(): Boolean {
+        fun bar() = result
+        return bar()
+    }
+
+    return foo()
+}
+
+fun litlit(): Boolean {
+    val result = true
+
+    return myRun {
+        myRun { result }
+    }
+}
+
+fun funlit(): Boolean {
+    val result = true
+
+    fun foo(): Boolean {
+        return myRun { result }
+    }
+
+    return foo()
+}
+
+fun litfun(): Boolean {
+    val result = true
+
+    return myRun {
+        fun bar() = result
+        bar()
+    }
+}
+
+fun box(): String {
+    if (!funfun()) return "funfun failed"
+    if (!litlit()) return "litlit failed"
+    if (!funlit()) return "funlit failed"
+    if (!litfun()) return "litfun failed"
+
+    return "OK"
+}