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

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

@@ -0,0 +1,27 @@
+package foo
+
+object A {
+    val a = 1
+    fun foo() = 31
+
+    val f = { a + foo() }
+}
+
+class B {
+    companion object {
+        val a = 21
+        fun foo() = 3
+
+        val f = { this.a + this.foo() }
+    }
+}
+
+fun box(): String {
+    val a = A.f()
+    if (a != 32) return "a != 32, a = $a"
+
+    val b = B.f()
+    if (b != 24) return "b != 24, b = $b"
+
+    return "OK"
+}