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

js/js.translator/testData/box/callableReference/function/localLocal.kt

@@ -0,0 +1,13 @@
+// This test was adapted from compiler/testData/codegen/box/callableReference/function/local/.
+package foo
+
+fun box(): String {
+    fun foo(): String {
+        fun bar() = "OK"
+        val ref = ::bar
+        return ref()
+    }
+
+    val ref = ::foo
+    return ref()
+}